{
  "paper": {
    "school": "CHIJ Primary (Toa Payoh)",
    "year": 2022,
    "level": "P3",
    "label": "Topical Test",
    "source_prefix": "CHIJ 2022 P3 Topical Test",
    "has_answer_key": true,
    "notes": "Bundle of 7 topical tests in one PDF: Angles, Parallel & Perpendicular Lines, Money, Graph, Division of Whole Numbers, Whole Numbers Multiplication, Whole Numbers Addition & Subtraction, Length/Mass/Volume. Each test restarts numbering at Q1; manifest uses topic-prefixed source labels. Answer keys on pages 29, 31, 32, 33."
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "How many angles does this figure have?",
      "answer0": "7", "answer1": "6", "answer2": "5", "answer3": "4",
      "correct_answer": 1,
      "skill_id": 98,
      "difficulty_id": 1,
      "explanation": "A hexagon has 6 angles, one at each vertex.",
      "hints": ["Count the corners (vertices) of the shape.", "Each corner is one angle."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q1",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_1.png",
      "image_page": 1,
      "image_loc": "middle of page, below the question (a hexagon)",
      "notes": "Answer key Q1 = (2) i.e. 6."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "How many angles does this figure have?",
      "answer0": "7", "answer1": "8", "answer2": "9", "answer3": "10",
      "correct_answer": 1,
      "skill_id": 98,
      "difficulty_id": 1,
      "explanation": "An octagon has 8 angles, one at each vertex.",
      "hints": ["Count the corners of the shape.", "It is an eight-sided figure."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q2",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_2.png",
      "image_page": 1,
      "image_loc": "middle of page, below the question (an octagon)",
      "notes": "Answer key Q2 = (2) i.e. 8."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "In the figure, how many angles are acute?",
      "answer0": "1", "answer1": "2", "answer2": "3", "answer3": "4",
      "correct_answer": 1,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "The trapezium has two acute angles (the two slanted base angles) and two obtuse angles.",
      "hints": ["An acute angle is smaller than a right angle.", "Look for the angles that are 'sharper' than a square corner."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q3",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_3.png",
      "image_page": 1,
      "image_loc": "bottom of page, below the question (a trapezium)",
      "notes": "Stripped directional 'below'. Answer key Q3 = (2) i.e. 2."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Which one of the following is a right angle?",
      "answer0": "Figure 1", "answer1": "Figure 2", "answer2": "Figure 3", "answer3": "Figure 4",
      "correct_answer": 0,
      "skill_id": 99,
      "difficulty_id": 1,
      "explanation": "Figure (1) shows two lines meeting to form a square corner (90 degrees).",
      "hints": ["A right angle looks like the corner of a square or book.", "It is exactly 90 degrees."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q4",
      "image_needed": true,
      "image_options": true,
      "image_file": null,
      "image_page": 2,
      "image_loc": "top of page; four option diagrams labelled (1)-(4)",
      "notes": "Image-option MCQ; each option (1)-(4) is an angle diagram. Crop q_angles_4_opt0.png..q_angles_4_opt3.png. Answer key Q4 = (1)."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "How many right angles does the figure have?",
      "answer0": "4", "answer1": "2", "answer2": "3", "answer3": "5",
      "correct_answer": 2,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "The figure (a right-angled quadrilateral with two square corners shown plus one more) has 3 right angles.",
      "hints": ["Look for corners that form a square 90-degree corner.", "Count only the right-angle corners."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q5",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_5.png",
      "image_page": 2,
      "image_loc": "middle of page, below the question (a quadrilateral)",
      "notes": "Stripped 'following'. Answer key Q5 = (3) i.e. 3."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "In the figure, how many of the marked angles are obtuse?",
      "answer0": "1", "answer1": "2", "answer2": "3", "answer3": "5",
      "correct_answer": 0,
      "skill_id": 99,
      "difficulty_id": 3,
      "explanation": "Of the marked angles on the figure, only 1 is obtuse (greater than a right angle).",
      "hints": ["An obtuse angle is bigger than a right angle but smaller than a straight line.", "Compare each marked angle with a square corner."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q6",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_6.png",
      "image_page": 2,
      "image_loc": "middle of page, below the question (an arrow-like polygon with marked angles)",
      "notes": "Stripped 'following'. Answer key Q6 = (1) i.e. 1."
    },
    {
      "n": 7,
      "type_id": 0,
      "question": "Look at the angles and identify the angles correctly. Sort angles a, b, c into the table: Right Angle, Obtuse Angle, Acute Angle.",
      "answer0": null, "answer1": null, "answer2": null, "answer3": null,
      "correct_answer": null,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "Right Angle = b; Obtuse Angle = c; Acute Angle = a.",
      "hints": ["A right angle is a square corner.", "An obtuse angle is wider than a right angle; an acute angle is narrower."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q7",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_7.png",
      "image_page": 2,
      "image_loc": "bottom of page; three labelled angles a, b, c above a classification table",
      "notes": "Interactive table-sort (match-into-table) — no app type. type_id 0, SKIPPED on insert. Answer key Q7: Right=b, Obtuse=c, Acute=a."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "Look at the figure and answer the questions that follow. (a) [?] angles are obtuse angles. (b) [?] angles are right angles. (c) [?] angles are acute angles.",
      "answer0": "3", "answer1": "2", "answer2": "0",
      "correct_answer": null,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "For the pentagon-house figure: 3 obtuse angles, 2 right angles, 0 acute angles.",
      "hints": ["Classify each corner: right, obtuse or acute.", "Count how many fall into each group."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q8",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_8.png",
      "image_page": 3,
      "image_loc": "top of page, below the question (a house/pentagon shape)",
      "notes": "Stripped 'below'. Answer key Q8: (a) 3, (b) 2, (c) 0."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "Mark the angles that are acute angles. There are [?] angles which are acute.",
      "answer0": "3",
      "correct_answer": null,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "There are 3 acute angles in the zig-zag figure.",
      "hints": ["An acute angle is smaller than a right angle.", "Count the sharp angles."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q9",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_9.png",
      "image_page": 3,
      "image_loc": "middle of page, below the question (a zig-zag line figure)",
      "notes": "Reframed the 'mark...' instruction into the FIB count it actually asks for. Answer key Q9 = 3."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Compare the angles and fill in the blanks. (a) Angle [?] is the biggest angle. (b) Angle [?] is an obtuse angle. (c) Angle [?] is a right angle. (d) Angle [?] is an acute angle.",
      "answer0": "c", "answer1": "c", "answer2": "b", "answer3": "a",
      "correct_answer": null,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "Angle c is the biggest (obtuse); c is the obtuse angle; b is the right angle; a is the acute angle.",
      "hints": ["Compare each angle to a square corner (right angle).", "Bigger than right = obtuse; smaller = acute."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_10.png",
      "image_page": 3,
      "image_loc": "middle of page; three labelled angles a, b, c above the blanks",
      "notes": "Stripped 'following'. Answers are single letters (a/b/c) so FIB is acceptable. Answer key Q10: (a) c, (b) c, (c) b, (d) a."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "Study the figure and fill in the blanks. (a) [?] angles are right angles. (b) [?] angles are acute angles.",
      "answer0": "2", "answer1": "3",
      "correct_answer": null,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "The figure has 2 right angles and 3 acute angles.",
      "hints": ["Identify the square-corner angles for right angles.", "Sharp angles are acute."],
      "source": "CHIJ 2022 P3 Topical Test (Angles) Q11",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_angles_11.png",
      "image_page": 3,
      "image_loc": "bottom of page, below the question (a right-triangle/quadrilateral figure)",
      "notes": "Stripped 'below'. Answer key Q11: (a) 2, (b) 3."
    },
    {
      "n": 12,
      "type_id": 1,
      "question": "Which of the following pairs of lines are parallel?",
      "answer0": "Figure 1", "answer1": "Figure 2", "answer2": "Figure 3", "answer3": "Figure 4",
      "correct_answer": 1,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "Parallel lines never meet and stay the same distance apart; option (2) shows such a pair.",
      "hints": ["Parallel lines are always the same distance apart.", "They never cross or meet."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q1",
      "image_needed": true,
      "image_options": true,
      "image_file": null,
      "image_page": 5,
      "image_loc": "middle of page; four option diagrams labelled 1)-4)",
      "notes": "Image-option MCQ; crop q_pp_1_opt0.png..q_pp_1_opt3.png. Answer key Q1 = (2)."
    },
    {
      "n": 13,
      "type_id": 1,
      "question": "Which one of the following pairs are perpendicular lines?",
      "answer0": "Figure 1", "answer1": "Figure 2", "answer2": "Figure 3", "answer3": "Figure 4",
      "correct_answer": 2,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "Perpendicular lines meet at a right angle (90 degrees); option (3) shows them crossing at a right angle.",
      "hints": ["Perpendicular lines meet to form a right angle.", "Look for the pair that makes a square corner."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q2",
      "image_needed": true,
      "image_options": true,
      "image_file": null,
      "image_page": 6,
      "image_loc": "top half of page; four option diagrams labelled (1)-(4)",
      "notes": "Image-option MCQ; crop q_pp_2_opt0.png..q_pp_2_opt3.png. Answer key Q2 = (3)."
    },
    {
      "n": 14,
      "type_id": 1,
      "question": "Which line is perpendicular to AD?",
      "answer0": "AE", "answer1": "DE", "answer2": "AB", "answer3": "EF",
      "correct_answer": 1,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "In the figure, DE meets AD at a right angle (the right-angle mark is at D), so DE is perpendicular to AD.",
      "hints": ["Find the line that meets AD at a square corner.", "Look for the right-angle marking."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q3",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_pp_3.png",
      "image_page": 6,
      "image_loc": "bottom half of page; labelled figure with vertices A, B, C, D, E, F and right-angle marks at B and D",
      "notes": "Answer key Q3 = (2) i.e. DE."
    },
    {
      "n": 15,
      "type_id": 1,
      "question": "Which of the following figure contains only a pair of parallel lines and two pairs of perpendicular lines?",
      "answer0": "A", "answer1": "B", "answer2": "C", "answer3": "D",
      "correct_answer": 3,
      "skill_id": 100,
      "difficulty_id": 3,
      "explanation": "Figure D (a house/pentagon shape with a rectangular base) has one pair of parallel lines and two pairs of perpendicular lines.",
      "hints": ["Count the parallel pairs and the perpendicular (right-angle) pairs in each figure.", "You need exactly one parallel pair and two perpendicular pairs."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q4",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_pp_4.png",
      "image_page": 7,
      "image_loc": "top half of page; four labelled figures A (rectangle), B (triangle), C (parallelogram), D (pentagon/house)",
      "notes": "Answer key Q4 = (4) i.e. D."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "Name the pair of parallel lines in the figure. [?]",
      "answer0": "BC // DE",
      "correct_answer": null,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "In the labelled figure, BC and DE are parallel: BC // DE.",
      "hints": ["Look for the two sides that are the same distance apart all along.", "Name them using their endpoint letters."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q5",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_pp_5.png",
      "image_page": 7,
      "image_loc": "bottom half of page; pentagon labelled A, B, C, D, E",
      "notes": "Stripped 'below'. Symbolic answer (line names) so FIB ok. Answer key Q5 = BC // DE."
    },
    {
      "n": 17,
      "type_id": 2,
      "question": "Which line is perpendicular to line AF? [?]",
      "answer0": "AC",
      "correct_answer": null,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "Line AC meets line AF at a right angle, so AC is perpendicular to AF.",
      "hints": ["Find the line meeting AF at a square corner.", "Use the labelled points to name it."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q6",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_pp_6.png",
      "image_page": 8,
      "image_loc": "upper half of page; figure with lines through points G, F, E, b, A, B, C",
      "notes": "Symbolic answer (line name). Answer key Q6 = AC."
    },
    {
      "n": 18,
      "type_id": 2,
      "question": "Look at the figure and name the pair of perpendicular lines. [?]",
      "answer0": "AB ⊥ FE",
      "correct_answer": null,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "Line FE crosses line AB at a right angle, so AB is perpendicular to FE: AB ⊥ FE.",
      "hints": ["Find the line that crosses AB at a square corner.", "Name the perpendicular pair using their letters."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q7",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_pp_7.png",
      "image_page": 8,
      "image_loc": "lower half of page; horizontal line AB crossed by lines QP, FE and NM",
      "notes": "Stripped 'below'. Symbolic answer. Answer key Q7 = AB ⊥ FE."
    },
    {
      "n": 19,
      "type_id": 0,
      "question": "In the grid, draw a line XY parallel to line AB.",
      "answer0": null, "answer1": null, "answer2": null, "answer3": null,
      "correct_answer": null,
      "skill_id": 101,
      "difficulty_id": 2,
      "explanation": "Draw any line on the grid that has the same slope as AB and never meets it (parallel).",
      "hints": ["A parallel line has the same slant as AB.", "Use the grid to keep the same gradient."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q8",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_pp_8.png",
      "image_page": 9,
      "image_loc": "top half of page; square grid with line AB drawn",
      "notes": "Draw-on-grid task — no app type. type_id 0, SKIPPED on insert. Stripped 'below'. Answer key Q8 shows a drawn parallel line."
    },
    {
      "n": 20,
      "type_id": 2,
      "question": "Which line is perpendicular to line AB? [?]",
      "answer0": "CD ⊥ AB",
      "correct_answer": null,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "On the grid, line CD meets line AB at a right angle, so CD is perpendicular to AB.",
      "hints": ["Find the line crossing AB at a square corner on the grid.", "Name it with its endpoint letters."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q9",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_pp_9.png",
      "image_page": 9,
      "image_loc": "bottom half of page; grid with lines through points A, B, C, D, E, F, G, H, J, K",
      "notes": "Symbolic answer. Answer key Q9 = CD ⊥ AB."
    },
    {
      "n": 21,
      "type_id": 2,
      "question": "Study the figure and answer. (a) How many pairs of perpendicular lines are there? (b) How many pairs of parallel lines are there? (a) [?] (b) [?]",
      "answer0": "4", "answer1": "2",
      "correct_answer": null,
      "skill_id": 100,
      "difficulty_id": 3,
      "explanation": "For the rectangle figure there are 4 pairs of perpendicular lines and 2 pairs of parallel lines.",
      "hints": ["A rectangle's adjacent sides are perpendicular.", "Opposite sides are parallel."],
      "source": "CHIJ 2022 P3 Topical Test (Parallel & Perpendicular Lines) Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_pp_10.png",
      "image_page": 10,
      "image_loc": "top of page, below the intro line (a rectangle)",
      "notes": "Stripped 'below'. Two parts combined into one multi-blank FIB. Answer key Q10: a) 4, b) 2."
    },
    {
      "n": 22,
      "type_id": 1,
      "question": "Express $33.70 in cents.",
      "answer0": "337 cents", "answer1": "370 cents", "answer2": "3307 cents", "answer3": "3370 cents",
      "correct_answer": 3,
      "skill_id": 82,
      "difficulty_id": 1,
      "explanation": "$1 = 100 cents, so $33.70 = 33.70 x 100 = 3370 cents.",
      "hints": ["Multiply the dollar amount by 100.", "$33.70 x 100 = 3370."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q1 = (4) i.e. 3370 cents."
    },
    {
      "n": 23,
      "type_id": 1,
      "question": "What is the value of $1.40 + 45cents?",
      "answer0": "$0.95", "answer1": "$1.85", "answer2": "$5.90", "answer3": "$46.40",
      "correct_answer": 1,
      "skill_id": 82,
      "difficulty_id": 1,
      "explanation": "45 cents = $0.45, so $1.40 + $0.45 = $1.85.",
      "hints": ["Convert 45 cents to dollars: $0.45.", "Add: $1.40 + $0.45."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q2 = (2) i.e. $1.85."
    },
    {
      "n": 24,
      "type_id": 1,
      "question": "How many 10 cents are there in $9.90?",
      "answer0": "9", "answer1": "99", "answer2": "990", "answer3": "9900",
      "correct_answer": 1,
      "skill_id": 82,
      "difficulty_id": 2,
      "explanation": "$9.90 = 990 cents; 990 ÷ 10 = 99.",
      "hints": ["Change $9.90 into cents: 990 cents.", "Divide by 10."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q3 = (2) i.e. 99."
    },
    {
      "n": 25,
      "type_id": 1,
      "question": "If 2 pencils cost $1, how much will 14 such pencils cost?",
      "answer0": "$7", "answer1": "$8", "answer2": "$14", "answer3": "$28",
      "correct_answer": 0,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "14 pencils = 7 groups of 2 pencils; each group costs $1, so 7 x $1 = $7.",
      "hints": ["How many pairs of pencils are in 14?", "Each pair costs $1."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q4 = (1) i.e. $7."
    },
    {
      "n": 26,
      "type_id": 1,
      "question": "How many 20 cent coins can Mr Sim exchange for six 50 cent coins?",
      "answer0": "5", "answer1": "7", "answer2": "15", "answer3": "20",
      "correct_answer": 2,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "Six 50-cent coins = 300 cents; 300 ÷ 20 = 15 twenty-cent coins.",
      "hints": ["Find the total value of six 50-cent coins.", "Divide that total by 20."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q5 = (3) i.e. 15."
    },
    {
      "n": 27,
      "type_id": 2,
      "question": "Benny bought the following items from a shop: Note Book $3.45, Mechanical Pencil $1.85, Sharpener 80 cents. How much did he spend altogether? [?]",
      "answer0": "$6.10",
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "$3.45 + $1.85 + $0.80 = $6.10.",
      "hints": ["Add the three prices together.", "Remember 80 cents = $0.80."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Prices inlined from the table (kept verbatim). Answer key Q6 = $6.10."
    },
    {
      "n": 28,
      "type_id": 2,
      "question": "Jane collected $400 from his 'red packets' during Chinese New Year. She spent $245. How much money had she left? [?]",
      "answer0": "$155",
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "$400 - $245 = $155.",
      "hints": ["Subtract what she spent from what she collected.", "$400 - $245."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q7 = $155."
    },
    {
      "n": 29,
      "type_id": 2,
      "question": "After spending 60 cents on food during recess, Henry had $1.20 left. How much money did she have at first? [?]",
      "answer0": "$1.80",
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "$1.20 + $0.60 = $1.80.",
      "hints": ["Add back the money spent to the money left.", "$1.20 + $0.60."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q8 = $1.80."
    },
    {
      "n": 30,
      "type_id": 2,
      "question": "Kegan bought 4 bookmarks at $2 each and a pen that cost $6. How much did she pay altogether? [?]",
      "answer0": "$14",
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "4 x $2 = $8 for bookmarks; $8 + $6 = $14.",
      "hints": ["Find the cost of the 4 bookmarks first.", "Then add the pen."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q9: 4 x 2 = 8, 8 + 6 = $14."
    },
    {
      "n": 31,
      "type_id": 2,
      "question": "The table shows a menu of a restaurant: Fish and Chips $13.80, Pork Chop $12.50, Chicken Chop $16.60, Potato Salad $5.90. Mr Soh and family ordered 3 different types of food from the menu. What was the largest amount of money he would have to pay? [?]",
      "answer0": "$42.90",
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 3,
      "explanation": "Largest 3 prices: $16.60 + $13.80 + $12.50 = $42.90.",
      "hints": ["Pick the three most expensive items.", "$16.60 + $13.80 + $12.50."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Menu inlined verbatim. Answer key Q10: $13.80 + $12.50 = $26.30, $26.30 + $16.60 = $42.90."
    },
    {
      "n": 32,
      "type_id": 2,
      "question": "Sharon bought a doll for $42.75 and a brooch for $17.50. She had $37.20 left. How much did she have at first? [?]",
      "answer0": "$97.45",
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 3,
      "explanation": "$42.75 + $17.50 = $60.25 spent; $60.25 + $37.20 = $97.45.",
      "hints": ["Add the doll and brooch costs.", "Then add the money she had left."],
      "source": "CHIJ 2022 P3 Topical Test (Money) Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q11: $42.75 + $17.50 = $60.25, $60.25 + $37.20 = $97.45."
    },
    {
      "n": 33,
      "type_id": 2,
      "question": "The bar graph shows 4 games played by different pupils in a school. (a) Complete the table: Number of pupils for Netball, Soccer, Hockey, Tennis. Netball = [?], Soccer = [?], Hockey = [?], Tennis = [?].",
      "answer0": "90", "answer1": "100", "answer2": "50", "answer3": "30",
      "correct_answer": null,
      "skill_id": 102,
      "difficulty_id": 2,
      "explanation": "Read each bar: Netball 90, Soccer 100, Hockey 50, Tennis 30.",
      "hints": ["Read the length of each bar against the scale.", "The scale goes up in tens."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q1a",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_1.png",
      "image_page": 15,
      "image_loc": "middle of page; horizontal bar graph with bars Tennis, Soccer, Netball, Hockey",
      "notes": "Bar graph reading. Table order in paper is Netball, Soccer, Hockey, Tennis (Soccer=50 was pre-filled in paper but key gives Soccer=100; Hockey=50). Answer key Q1a: Netball 90, Soccer 100, Hockey 50, Tennis 30."
    },
    {
      "n": 34,
      "type_id": 2,
      "question": "There are [?] pupils altogether.",
      "answer0": "270",
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "90 + 100 + 50 + 30 = 270.",
      "hints": ["Add the pupils for all four games.", "90 + 100 + 50 + 30."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q1b",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_1.png",
      "image_page": 15,
      "image_loc": "middle of page; horizontal bar graph (same as Graph Q1a)",
      "notes": "Answer key Q1b = 270."
    },
    {
      "n": 35,
      "type_id": 2,
      "question": "[?] fewer pupils play tennis than hockey.",
      "answer0": "20",
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Hockey 50 - Tennis 30 = 20.",
      "hints": ["Find hockey and tennis counts.", "Subtract: 50 - 30."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q1c",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_1.png",
      "image_page": 15,
      "image_loc": "middle of page; horizontal bar graph (same as Graph Q1a)",
      "notes": "Answer key Q1c = 20."
    },
    {
      "n": 36,
      "type_id": 2,
      "question": "[?] more pupils play soccer than netball.",
      "answer0": "10",
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Soccer 100 - Netball 90 = 10.",
      "hints": ["Find soccer and netball counts.", "Subtract: 100 - 90."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q1d",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_1.png",
      "image_page": 15,
      "image_loc": "middle of page; horizontal bar graph (same as Graph Q1a)",
      "notes": "Answer key Q1d = 10."
    },
    {
      "n": 37,
      "type_id": 2,
      "question": "There are 2 times as many pupils playing [?] than [?].",
      "answer0": "soccer", "answer1": "hockey",
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Soccer (100) is 2 times Hockey (50).",
      "hints": ["Find a game whose count is double another.", "100 is twice 50."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q1e",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_1.png",
      "image_page": 15,
      "image_loc": "bar graph (same as Graph Q1a)",
      "notes": "Answers are game names but constrained to the four labels; FIB acceptable. Answer key Q1e: soccer than hockey."
    },
    {
      "n": 38,
      "type_id": 2,
      "question": "There are [?] times as many pupils playing netball than tennis.",
      "answer0": "3",
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Netball 90 ÷ Tennis 30 = 3.",
      "hints": ["Divide netball count by tennis count.", "90 ÷ 30."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q1f",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_1.png",
      "image_page": 15,
      "image_loc": "bar graph (same as Graph Q1a)",
      "notes": "Answer key Q1f = 3."
    },
    {
      "n": 39,
      "type_id": 2,
      "question": "The bar graph shows the number of visitors to an art exhibition in 5 days. [?] people visited the exhibition on Monday.",
      "answer0": "150",
      "correct_answer": null,
      "skill_id": 102,
      "difficulty_id": 2,
      "explanation": "Monday's bar reaches 150.",
      "hints": ["Read the Monday bar against the scale.", "The scale goes up in fifties."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q2a",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_2.png",
      "image_page": 16,
      "image_loc": "middle of page; vertical bar graph Monday-Friday",
      "notes": "Answer key Q2a = 150."
    },
    {
      "n": 40,
      "type_id": 2,
      "question": "The exhibition had the least number of visitors on [?].",
      "answer0": "Wednesday",
      "correct_answer": null,
      "skill_id": 102,
      "difficulty_id": 2,
      "explanation": "Wednesday's bar is the shortest (100).",
      "hints": ["Find the shortest bar.", "That day had the fewest visitors."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q2b",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_2.png",
      "image_page": 16,
      "image_loc": "vertical bar graph (same as Graph Q2a)",
      "notes": "Answer is a constrained day name; FIB ok. Answer key Q2b = Wednesday."
    },
    {
      "n": 41,
      "type_id": 2,
      "question": "[?] more people visited the exhibition on Tuesday than Friday.",
      "answer0": "100",
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Tuesday 300 - Friday 200 = 100.",
      "hints": ["Read Tuesday and Friday bars.", "Subtract: 300 - 200."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q2c",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_2.png",
      "image_page": 16,
      "image_loc": "vertical bar graph (same as Graph Q2a)",
      "notes": "Answer key Q2c = 100."
    },
    {
      "n": 42,
      "type_id": 2,
      "question": "[?] fewer people visited the exhibition on Monday than Friday.",
      "answer0": "50",
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Friday 200 - Monday 150 = 50.",
      "hints": ["Read Friday and Monday bars.", "Subtract: 200 - 150."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q2d",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_2.png",
      "image_page": 16,
      "image_loc": "vertical bar graph (same as Graph Q2a)",
      "notes": "Answer key Q2d = 50."
    },
    {
      "n": 43,
      "type_id": 2,
      "question": "[?] and [?] had the same number of visitors.",
      "answer0": "Monday", "answer1": "Thursday",
      "correct_answer": null,
      "skill_id": 102,
      "difficulty_id": 2,
      "explanation": "Monday and Thursday bars are equal (150 each).",
      "hints": ["Find two bars of equal height.", "Monday and Thursday match."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q2e",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_2.png",
      "image_page": 16,
      "image_loc": "vertical bar graph (same as Graph Q2a)",
      "notes": "Answer key Q2e: Monday and Thursday."
    },
    {
      "n": 44,
      "type_id": 2,
      "question": "There are 3 times as many visitors on [?] as on [?].",
      "answer0": "Tuesday", "answer1": "Wednesday",
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Tuesday 300 is 3 times Wednesday 100.",
      "hints": ["Find a day whose visitors are triple another's.", "300 is 3 x 100."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q2f",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_2.png",
      "image_page": 16,
      "image_loc": "vertical bar graph (same as Graph Q2a)",
      "notes": "Answer key Q2f: Tuesday as on Wednesday."
    },
    {
      "n": 45,
      "type_id": 2,
      "question": "The total number of visitors on Friday and Wednesday is the same as the total number of visitors on [?] and [?].",
      "answer0": "Monday", "answer1": "Thursday",
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 3,
      "explanation": "Friday 200 + Wednesday 100 = 300; Monday 150 + Thursday 150 = 300.",
      "hints": ["Add Friday and Wednesday: 200 + 100 = 300.", "Find two other days adding to 300."],
      "source": "CHIJ 2022 P3 Topical Test (Graph) Q2g",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_graph_2.png",
      "image_page": 16,
      "image_loc": "vertical bar graph (same as Graph Q2a)",
      "notes": "Answer key Q2g: Monday and Thursday."
    },
    {
      "n": 46,
      "type_id": 2,
      "question": "What is the quotient in 48 ÷ 3? [?]",
      "answer0": "16",
      "correct_answer": null,
      "skill_id": 73,
      "difficulty_id": 1,
      "explanation": "48 ÷ 3 = 16.",
      "hints": ["The quotient is the answer to the division.", "How many 3s make 48?"],
      "source": "CHIJ 2022 P3 Topical Test (Division of Whole Numbers) Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q1 = 16."
    },
    {
      "n": 47,
      "type_id": 2,
      "question": "Find the remainder in 152 ÷ 7. [?]",
      "answer0": "5",
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "152 ÷ 7 = 21 remainder 5 (21 x 7 = 147, 152 - 147 = 5).",
      "hints": ["Divide 152 by 7 and look at what is left over.", "21 x 7 = 147."],
      "source": "CHIJ 2022 P3 Topical Test (Division of Whole Numbers) Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q2 = 5."
    },
    {
      "n": 48,
      "type_id": 2,
      "question": "Annie and her 7 friends shared 560 candies equally among themselves. How many candies did Annie have after sharing them? [?]",
      "answer0": "70",
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "Annie + 7 friends = 8 people; 560 ÷ 8 = 70.",
      "hints": ["Count the total number of people (Annie plus 7).", "Divide 560 by 8."],
      "source": "CHIJ 2022 P3 Topical Test (Division of Whole Numbers) Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q3 = 70."
    },
    {
      "n": 49,
      "type_id": 2,
      "question": "After Mrs Lim had distributed some stickers to 6 pupils, each pupil received 3 stickers and she had a remainder of 2 stickers. How many stickers did Mrs Lim have at first? [?]",
      "answer0": "20",
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "6 x 3 = 18 given out; 18 + 2 remainder = 20.",
      "hints": ["Find how many stickers were given out: 6 x 3.", "Add the 2 left over."],
      "source": "CHIJ 2022 P3 Topical Test (Division of Whole Numbers) Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q4 = 20."
    },
    {
      "n": 50,
      "type_id": 2,
      "question": "Audrey packs 292 stamps into packets of 4 stamps each. How many packets of stamps will she have? [?]",
      "answer0": "73",
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "292 ÷ 4 = 73 packets.",
      "hints": ["Divide the total stamps by the packet size.", "292 ÷ 4."],
      "source": "CHIJ 2022 P3 Topical Test (Division of Whole Numbers) Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q5 = 73."
    },
    {
      "n": 51,
      "type_id": 2,
      "question": "James has 12 bags of marbles. Each bag contains 5 marbles. He repacks them into bags of 6. How many bags does he have now? [?]",
      "answer0": "10",
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "12 x 5 = 60 marbles; 60 ÷ 6 = 10 bags.",
      "hints": ["Find the total marbles: 12 x 5.", "Divide by 6 to repack."],
      "source": "CHIJ 2022 P3 Topical Test (Division of Whole Numbers) Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q6: 12 x 5 = 60, 60 ÷ 6 = 10."
    },
    {
      "n": 52,
      "type_id": 2,
      "question": "Jack has 43 pencils. He needs to pack them into 5 boxes with an equal number of pencils in each box. (a) How many pencils are there in each box? (b) How many pencils will be left unpacked? (a) [?] (b) [?]",
      "answer0": "8", "answer1": "3",
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "43 ÷ 5 = 8 remainder 3, so 8 pencils per box and 3 unpacked.",
      "hints": ["Divide 43 by 5.", "The quotient is per box; the remainder is left over."],
      "source": "CHIJ 2022 P3 Topical Test (Division of Whole Numbers) Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Two parts combined into one multi-blank FIB. Answer key Q7: 43 ÷ 5 = 8 R3, (a) 8, (b) 3."
    },
    {
      "n": 53,
      "type_id": 2,
      "question": "Jenny has 222 stickers. She gives them equally to her 6 friends, how many sweets does each friend receive? [?]",
      "answer0": "37",
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "222 ÷ 6 = 37.",
      "hints": ["Divide the total by the number of friends.", "222 ÷ 6."],
      "source": "CHIJ 2022 P3 Topical Test (Division of Whole Numbers) Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Verbatim (paper says 'sweets'). Answer key Q8: 222 ÷ 6 = 37 stickers."
    },
    {
      "n": 54,
      "type_id": 2,
      "question": "57 X 2 = [?]",
      "answer0": "114",
      "correct_answer": null,
      "skill_id": 75,
      "difficulty_id": 1,
      "explanation": "57 x 2 = 114.",
      "hints": ["Multiply 57 by 2.", "Double 57."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Multiplication) Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Originally MCQ (1)114 (2)141 (3)411 (4)1114; converted to FIB per multiplication-fact rule. Answer key Q1 = (1) i.e. 114."
    },
    {
      "n": 55,
      "type_id": 2,
      "question": "3 x 8 = [?] x 4",
      "answer0": "6",
      "correct_answer": null,
      "skill_id": 73,
      "difficulty_id": 2,
      "explanation": "3 x 8 = 24; 24 ÷ 4 = 6, so the blank is 6.",
      "hints": ["Work out 3 x 8 first.", "What times 4 gives that product?"],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Multiplication) Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Originally MCQ (1)3 (2)8 (3)6 (4)24; the blank value is a definite number so converted to FIB. Answer key Q2 = (3) i.e. 6."
    },
    {
      "n": 56,
      "type_id": 1,
      "question": "3 x 134 is the same as",
      "answer0": "3 x 13 x 4", "answer1": "134 + 134 + 134", "answer2": "134 + 134", "answer3": "134 x 134 x 134",
      "correct_answer": 1,
      "skill_id": 72,
      "difficulty_id": 2,
      "explanation": "Multiplying by 3 means adding 134 three times: 134 + 134 + 134.",
      "hints": ["Multiplication is repeated addition.", "3 x 134 = 134 added 3 times."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Multiplication) Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Concept MCQ kept as MCQ (options are expressions, not values). Answer key Q3 = (2) i.e. 134 + 134 + 134."
    },
    {
      "n": 57,
      "type_id": 1,
      "question": "A bus can carry 128 passengers, how many passengers can 9 such buses carry?",
      "answer0": "137", "answer1": "952", "answer2": "1 152", "answer3": "1 182",
      "correct_answer": 2,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "128 x 9 = 1152.",
      "hints": ["Multiply the passengers per bus by the number of buses.", "128 x 9."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Multiplication) Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q4 = (3) i.e. 1 152."
    },
    {
      "n": 58,
      "type_id": 1,
      "question": "264 x 4 = [blank] + 560.",
      "answer0": "486", "answer1": "496", "answer2": "1 056", "answer3": "1 616",
      "correct_answer": 1,
      "skill_id": 75,
      "difficulty_id": 2,
      "explanation": "264 x 4 = 1056; 1056 - 560 = 496.",
      "hints": ["Work out 264 x 4 = 1056.", "Subtract 560 to find the blank."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Multiplication) Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "MCQ with a blank in the stem; kept as MCQ (4 numeric options). Answer key Q5 = (2) i.e. 496."
    },
    {
      "n": 59,
      "type_id": 1,
      "question": "The table shows the number of stickers owned by 2 pupils. Each circle represents 7 stickers. Berny has 6 circles; Jane has 4 circles. Jane has [blank] stickers fewer than Berny.",
      "answer0": "2", "answer1": "7", "answer2": "14", "answer3": "28",
      "correct_answer": 2,
      "skill_id": 73,
      "difficulty_id": 2,
      "explanation": "Berny 6 circles - Jane 4 circles = 2 circles difference; 2 x 7 = 14 stickers.",
      "hints": ["Find the difference in number of circles (6 - 4).", "Multiply that difference by 7."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Multiplication) Q6",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_mult_6.png",
      "image_page": 20,
      "image_loc": "middle of page; pictograph table with rows Berny (6 circles) and Jane (4 circles), each circle = 7 stickers",
      "notes": "Answer key Q6 = (3) i.e. 14."
    },
    {
      "n": 60,
      "type_id": 1,
      "question": "Find the product of 8 and 464.",
      "answer0": "457", "answer1": "472", "answer2": "3 682", "answer3": "3 712",
      "correct_answer": 3,
      "skill_id": 75,
      "difficulty_id": 2,
      "explanation": "8 x 464 = 3712.",
      "hints": ["Product means multiply.", "8 x 464."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Multiplication) Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q7 = (4) i.e. 3 712."
    },
    {
      "n": 61,
      "type_id": 2,
      "question": "5 years ago, Mary was 15 years old. Now, she is twice as old as her brother. How old is her brother now? [?]",
      "answer0": "10",
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "Mary now = 15 + 5 = 20; brother = 20 ÷ 2 = 10 years old.",
      "hints": ["Find Mary's age now (5 years after she was 15).", "Halve it to find her brother's age."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Multiplication) Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q8: 15 + 5 = 20, 20 ÷ 2 = 10 years old."
    },
    {
      "n": 62,
      "type_id": 2,
      "question": "Book A has 284 pages. Book B has 6 times as many pages as book A. What is the total number of pages in both books? [?]",
      "answer0": "1998",
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "Book B = 284 x 6 = 1704; total = 1704 + 284 = 1998.",
      "hints": ["Find Book B's pages: 284 x 6.", "Add Book A's pages."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Multiplication) Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q9: 284 x 6 = 1704, 1704 + 284 = 1998."
    },
    {
      "n": 63,
      "type_id": 2,
      "question": "Write the following in figures. (a) Eight thousand, nine hundred and five [?] (b) Six thousand and thirty-seven [?]",
      "answer0": "8905", "answer1": "6037",
      "correct_answer": null,
      "skill_id": 67,
      "difficulty_id": 1,
      "explanation": "Eight thousand, nine hundred and five = 8905; six thousand and thirty-seven = 6037.",
      "hints": ["Thousands, hundreds, tens, ones in order.", "Use 0 as a place holder where a place has none."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Addition and Subtraction) Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Numeric answers so FIB ok. Answer key Q1: a) 8905, b) 6037."
    },
    {
      "n": 64,
      "type_id": 1,
      "question": "In 387, the digit '3' is in the [blank] place. The value of digit '8' is [blank].",
      "answer0": "hundreds place; 80", "answer1": "tens place; 80", "answer2": "hundreds place; 8", "answer3": "tens place; 8",
      "correct_answer": 0,
      "skill_id": 66,
      "difficulty_id": 2,
      "explanation": "In 387, '3' is in the hundreds place and '8' is in the tens place with value 80.",
      "hints": ["Hundreds, tens, ones from left to right.", "The value of 8 in the tens place is 8 x 10."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Addition and Subtraction) Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Word/value fill-in ('hundreds' is a word) converted to MCQ per no-word-FIB rule. Answer key Q2: place = hundreds, value of 8 = 80."
    },
    {
      "n": 65,
      "type_id": 2,
      "question": "Complete the number patterns. (a) 3300, 4300, [?], [?], 7300 (b) [?], 1995, 2000, [?], 2010, 2015",
      "answer0": "5300", "answer1": "6300", "answer2": "1990", "answer3": "2005",
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 2,
      "explanation": "(a) +1000 each step: 5300, 6300. (b) +5 each step: 1990 before 1995, 2005 between 2000 and 2010.",
      "hints": ["Find the step size between known terms.", "(a) goes up by 1000; (b) goes up by 5."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Addition and Subtraction) Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Pattern fill = FIB. Blanks in reading order: a's two blanks then b's two blanks. Answer key Q3: a) 5300, 6300; b) 1990, 2005."
    },
    {
      "n": 66,
      "type_id": 2,
      "question": "What is the sum of 6500 and 2000? [?]",
      "answer0": "8500",
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "6500 + 2000 = 8500.",
      "hints": ["Sum means add.", "6500 + 2000."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Addition and Subtraction) Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q4 = 8500."
    },
    {
      "n": 67,
      "type_id": 2,
      "question": "Find the difference between 3000 and 2320. [?]",
      "answer0": "680",
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "3000 - 2320 = 680.",
      "hints": ["Difference means subtract.", "3000 - 2320."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Addition and Subtraction) Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q5 = 680."
    },
    {
      "n": 68,
      "type_id": 2,
      "question": "What is the greatest 4-digit even number that you can make using all the digits 5, 6, 7, 8? [?]",
      "answer0": "8756",
      "correct_answer": null,
      "skill_id": 68,
      "difficulty_id": 3,
      "explanation": "For the greatest number, arrange digits largest first (8,7,6,5) but the last digit must be even; 8756 ends in 6 (even) and is the greatest such arrangement.",
      "hints": ["Put the biggest digits first.", "The last digit must be even (6 or 8)."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Addition and Subtraction) Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q6 = 8756."
    },
    {
      "n": 69,
      "type_id": 2,
      "question": "What is the smallest 4-digit odd number that you can make using all the digits 9, 8, 6, 4? [?]",
      "answer0": "4689",
      "correct_answer": null,
      "skill_id": 68,
      "difficulty_id": 3,
      "explanation": "Smallest number: arrange smallest first but the last digit must be odd; 4689 ends in 9 (odd) and is the smallest such arrangement.",
      "hints": ["Put the smallest digits first.", "The last digit must be odd (9)."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Addition and Subtraction) Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q7 = 4689."
    },
    {
      "n": 70,
      "type_id": 2,
      "question": "Sally is 8 years old. Her sister is 14 years older than she is. Find their total ages? [?]",
      "answer0": "30",
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 2,
      "explanation": "Sister = 8 + 14 = 22; total = 22 + 8 = 30.",
      "hints": ["Find the sister's age first.", "Add both ages together."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Addition and Subtraction) Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q8: 8 + 14 = 22, 22 + 8 = 30."
    },
    {
      "n": 71,
      "type_id": 2,
      "question": "An MRT train left the Toa Payoh station with some passengers on it. At the Bishan station, 9 passengers alighted and 16 passengers boarded the train. The train then had 70 passengers. How many passengers were there on the train when it left the Toa Payoh Station? [?]",
      "answer0": "63",
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 3,
      "explanation": "Work backwards: 70 - 16 + 9 = 63 passengers at the start.",
      "hints": ["Reverse the changes: undo the 16 who boarded, then undo the 9 who alighted.", "70 - 16 = 54, 54 + 9 = 63."],
      "source": "CHIJ 2022 P3 Topical Test (Whole Numbers - Addition and Subtraction) Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q9: 70 - 16 = 54, 54 + 9 = 63 passengers."
    },
    {
      "n": 72,
      "type_id": 2,
      "question": "150 cm = [?] m [?] cm",
      "answer0": "1", "answer1": "50",
      "correct_answer": null,
      "skill_id": 86,
      "difficulty_id": 1,
      "explanation": "100 cm = 1 m, so 150 cm = 1 m 50 cm.",
      "hints": ["100 cm makes 1 m.", "150 cm = 1 m and the rest in cm."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q1 = 1m 50cm."
    },
    {
      "n": 73,
      "type_id": 2,
      "question": "3080 m = [?] km [?] m",
      "answer0": "3", "answer1": "80",
      "correct_answer": null,
      "skill_id": 86,
      "difficulty_id": 1,
      "explanation": "1000 m = 1 km, so 3080 m = 3 km 80 m.",
      "hints": ["1000 m makes 1 km.", "3080 m = 3 km and the remaining metres."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q2 = 3km 80m."
    },
    {
      "n": 74,
      "type_id": 2,
      "question": "4 kg 4g = [?] g",
      "answer0": "4004",
      "correct_answer": null,
      "skill_id": 86,
      "difficulty_id": 1,
      "explanation": "1 kg = 1000 g, so 4 kg 4 g = 4000 + 4 = 4004 g.",
      "hints": ["1 kg = 1000 g.", "4 kg = 4000 g, then add 4 g."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q3 = 4004g."
    },
    {
      "n": 75,
      "type_id": 2,
      "question": "3873 ml = [?] ℓ [?] ml",
      "answer0": "3", "answer1": "873",
      "correct_answer": null,
      "skill_id": 86,
      "difficulty_id": 1,
      "explanation": "1000 ml = 1 ℓ, so 3873 ml = 3 ℓ 873 ml.",
      "hints": ["1000 ml makes 1 litre.", "3873 ml = 3 ℓ and the rest in ml."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q4 = 3ℓ 873ml."
    },
    {
      "n": 76,
      "type_id": 2,
      "question": "5088 g = [?] kg [?] g",
      "answer0": "5", "answer1": "88",
      "correct_answer": null,
      "skill_id": 86,
      "difficulty_id": 1,
      "explanation": "1000 g = 1 kg, so 5088 g = 5 kg 88 g.",
      "hints": ["1000 g makes 1 kg.", "5088 g = 5 kg and the remaining grams."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q5 = 5kg 88g."
    },
    {
      "n": 77,
      "type_id": 2,
      "question": "5m - 2m 68cm = [?] m [?] cm",
      "answer0": "2", "answer1": "32",
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "5 m = 4 m 100 cm; 4 m 100 cm - 2 m 68 cm = 2 m 32 cm.",
      "hints": ["Rename 5 m as 4 m 100 cm.", "Subtract the metres and centimetres separately."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q6 = 2m 32cm."
    },
    {
      "n": 78,
      "type_id": 2,
      "question": "3300g + 506g = [?] g = [?] kg [?] g",
      "answer0": "3806", "answer1": "3", "answer2": "806",
      "correct_answer": null,
      "skill_id": 86,
      "difficulty_id": 2,
      "explanation": "3300 g + 506 g = 3806 g = 3 kg 806 g.",
      "hints": ["Add the grams first.", "Then convert to kg and g (1000 g = 1 kg)."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q7 = 3806g = 3kg 806g."
    },
    {
      "n": 79,
      "type_id": 2,
      "question": "2 095 ml = 3 ℓ - [?] ml",
      "answer0": "905",
      "correct_answer": null,
      "skill_id": 86,
      "difficulty_id": 2,
      "explanation": "3 ℓ = 3000 ml; 3000 - 2095 = 905 ml.",
      "hints": ["3 ℓ = 3000 ml.", "3000 - 2095 gives the blank."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q8 = 905ml."
    },
    {
      "n": 80,
      "type_id": 2,
      "question": "The capacity of the unopened milk tin in the jug is 230ml. How much water is there in the measuring jug? [?] ml",
      "answer0": "470",
      "correct_answer": null,
      "skill_id": 442,
      "difficulty_id": 2,
      "explanation": "The water level reads 700 ml including the submerged milk tin; water alone = 700 - 230 = 470 ml.",
      "hints": ["Read the total level shown in the jug.", "Subtract the tin's capacity (230 ml)."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q9",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_lmv_9.png",
      "image_page": 26,
      "image_loc": "top of page; a measuring jug graduated 100-1000 ml with an unopened milk tin submerged",
      "notes": "Answer key Q9 = 470ml."
    },
    {
      "n": 81,
      "type_id": 2,
      "question": "Write the mass of the bag of oranges in kilograms and grams. [?] kg [?] g",
      "answer0": "3", "answer1": "750",
      "correct_answer": null,
      "skill_id": 85,
      "difficulty_id": 2,
      "explanation": "The scale pointer shows 3 kg 750 g.",
      "hints": ["Read where the pointer is on the kg scale.", "Each small mark is 250 g."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": "q_lmv_10.png",
      "image_page": 26,
      "image_loc": "middle of page; a bag of oranges on a dial weighing scale",
      "notes": "Answer key Q10 = 3 kg 750g."
    },
    {
      "n": 82,
      "type_id": 2,
      "question": "A container can hold 65ℓ of water. A tank can hold 4 times as much. How much water can the tank hold? [?] ℓ",
      "answer0": "260",
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "65 ℓ x 4 = 260 ℓ.",
      "hints": ["Multiply the container's capacity by 4.", "65 x 4."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q11: 65 x 4 = 260ℓ."
    },
    {
      "n": 83,
      "type_id": 2,
      "question": "Mrs Tan bought 740 cm of cloth. After sewing 5 similar dresses, she had 90 cm of cloth left. How much cloth did she use for each dress? Give your answer in metres and centimetres. [?] m [?] cm",
      "answer0": "1", "answer1": "30",
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 3,
      "explanation": "740 - 90 = 650 cm used; 650 ÷ 5 = 130 cm = 1 m 30 cm per dress.",
      "hints": ["Find the cloth used: 740 - 90.", "Divide by 5, then convert to m and cm."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q12: 740 - 90 = 650, 650 ÷ 5 = 130 cm = 1m 30cm."
    },
    {
      "n": 84,
      "type_id": 2,
      "question": "Harry, Ken and Marc weigh 140 kg altogether. If Harry and Ken have the same mass and Marc is 14 kg heavier than Harry, how heavy is Ken? [?] kg",
      "answer0": "42",
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 3,
      "explanation": "140 - 14 = 126 kg shared by 3 equal parts (Harry, Ken, and Marc-minus-14); 126 ÷ 3 = 42 kg = Ken.",
      "hints": ["Remove Marc's extra 14 kg from the total first.", "Divide the remaining 126 kg by 3."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q13: 140 - 14 = 126, 126 ÷ 3 = 42kg."
    },
    {
      "n": 85,
      "type_id": 2,
      "question": "7 trees are planted along a road at equal distances apart. The distance between two trees is 50m. How far away is the first tree from the last tree? [?] m",
      "answer0": "300",
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 3,
      "explanation": "7 trees make 6 gaps; 6 x 50 = 300 m.",
      "hints": ["Number of gaps = number of trees - 1.", "6 gaps x 50 m each."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q14: 50 x 6 = 300m."
    },
    {
      "n": 86,
      "type_id": 2,
      "question": "A jogging track is 800m long. Streetlights are placed along the track (including both ends) at intervals of 100m. How many streetlights are there along the jogging track? [?]",
      "answer0": "9",
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 3,
      "explanation": "800 ÷ 100 = 8 intervals; including both ends gives 8 + 1 = 9 streetlights.",
      "hints": ["Find the number of intervals: 800 ÷ 100.", "Including both ends, add 1 to the number of intervals."],
      "source": "CHIJ 2022 P3 Topical Test (Length, Mass, Volume) Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "image_page": null,
      "notes": "Answer key Q15 = 9."
    }
  ]
}