{
  "paper": {
    "school": "CHIJ St Nicholas Girls' School",
    "year": 2023,
    "level": "P2",
    "label": "Term 3 Revision",
    "source_prefix": "CHIJ 2023 P2 Term 3 Revision",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "The mass of the school bag is about ___________.",
      "answer0": "3 g",
      "answer1": "30 g",
      "answer2": "3 kg",
      "answer3": "30 kg",
      "correct_answer": 2,
      "skill_id": 52,
      "difficulty_id": 1,
      "explanation": "A school bag has a mass of about 3 kg. Grams are far too light and 30 kg is far too heavy.",
      "hints": ["Think about how heavy a bag of books feels.", "1 kg is about the mass of a small bag of rice."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q1",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 1,
      "image_loc": "middle of page, below the question (school bag drawing)",
      "notes": "Answer key Q1 = option (3) = 3 kg -> 0-based index 2."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "What is the mass of the apple?",
      "answer0": "100 g",
      "answer1": "150 g",
      "answer2": "250 g",
      "answer3": "350 g",
      "correct_answer": 1,
      "skill_id": 50,
      "difficulty_id": 2,
      "explanation": "The pointer is at 50 g (between 0 and 100). The 100 g weight added means the apple's reading subtracts the weight: apple = 150 g - the placed 100 g... pointer shows 150 g for apple+weight overlap; key answer is 150 g.",
      "hints": ["Read where the pointer on the scale is pointing.", "The marks count up in fifties between the hundreds."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q2",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 2,
      "image_loc": "top half of page, below the question (kitchen scale with apple and 100g weight)",
      "notes": "Answer key Q2 = option (2) = 150 g -> 0-based index 1. Scale reads to 500 g."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "What is the amount of money?",
      "answer0": "$1.60",
      "answer1": "$1.90",
      "answer2": "$160",
      "answer3": "$190",
      "correct_answer": 1,
      "skill_id": 45,
      "difficulty_id": 2,
      "explanation": "Count the coins shown to get $1.90.",
      "hints": ["Add up the value of all the coins.", "Watch the decimal point: dollars and cents."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q3",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 2,
      "image_loc": "bottom half of page, below the question (two rows of coins)",
      "notes": "Answer key Q3 = option (2) = $1.90 -> 0-based index 1."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Ben bought 4 cans of fruit juice. How much did he pay altogether?",
      "answer0": "$8",
      "answer1": "$6",
      "answer2": "$5",
      "answer3": "$4",
      "correct_answer": 0,
      "skill_id": 40,
      "difficulty_id": 1,
      "explanation": "Each can costs $2. 4 x $2 = $8.",
      "hints": ["Each can has a price tag of $2.", "Multiply the price by the number of cans."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q4",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 3,
      "image_loc": "upper-left, below the question (juice can with $2 price tag)",
      "notes": "Answer key Q4 = option (1) = $8 -> 0-based index 0."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "The eraser has ______ flat surfaces.",
      "answer0": "6",
      "answer1": "2",
      "answer2": "3",
      "answer3": "4",
      "correct_answer": 0,
      "skill_id": 62,
      "difficulty_id": 1,
      "explanation": "The eraser is a cuboid; a cuboid has 6 flat surfaces (faces).",
      "hints": ["The eraser is shaped like a box (cuboid).", "Count the faces: top, bottom, and four sides."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q5",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 3,
      "image_loc": "middle of page, below the question (cuboid eraser drawing)",
      "notes": "Answer key Q5 = option (1) = 6 -> 0-based index 0."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "Which of the following shows 1/4 of the figure shaded?",
      "answer0": "Figure 1",
      "answer1": "Figure 2",
      "answer2": "Figure 3",
      "answer3": "Figure 4",
      "correct_answer": 3,
      "skill_id": 41,
      "difficulty_id": 2,
      "explanation": "Figure 4 is divided into 4 equal triangles with 1 shaded, showing 1/4.",
      "hints": ["The whole must be split into 4 equal parts.", "Exactly one of the four equal parts should be shaded."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q6",
      "image_needed": true,
      "image_options": true,
      "image_file": null,
      "image_page": 4,
      "image_loc": "left side, four labelled option figures (1) bar (2) rhombus (3) circle (4) triangles",
      "notes": "Answer key Q6 = option (4) -> 0-based index 3. Options are pictures; crop each option figure to q6_opt0..q6_opt3.png."
    },
    {
      "n": 7,
      "type_id": 1,
      "question": "Study the diagram. The pumpkin is _______ than 4 kg.",
      "answer0": "more",
      "answer1": "less",
      "answer2": "equal",
      "answer3": "heavier",
      "correct_answer": 1,
      "skill_id": 53,
      "difficulty_id": 1,
      "explanation": "The scale needle points just past 3 kg, so the pumpkin is less than 4 kg.",
      "hints": ["Read where the needle points on the 6 kg scale.", "Compare that reading to the 4 kg mark."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q7",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 5,
      "image_loc": "upper-middle, below the question (pumpkin on a 6 kg dial scale)",
      "notes": "Word answer (more/less) -> MCQ per rules. Answer key Q7 = 'less' -> index 1."
    },
    {
      "n": 8,
      "type_id": 1,
      "question": "Compare the prices of the 3 items. The _______ is the most expensive item.",
      "answer0": "Sofa",
      "answer1": "Shelf",
      "answer2": "Dining table",
      "answer3": "They cost the same",
      "correct_answer": 0,
      "skill_id": 47,
      "difficulty_id": 2,
      "explanation": "Sofa $343.60, Shelf $200.45, Dining table $334.90. $343.60 is the greatest, so the sofa is the most expensive.",
      "hints": ["Compare the dollar amounts first, then the cents.", "Which price is the largest?"],
      "source": "CHIJ 2023 P2 Term 3 Revision Q8",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 5,
      "image_loc": "bottom half, three labelled items: Sofa $343.60, Shelf $200.45, Dining table $334.90",
      "notes": "Word answer (item name) -> MCQ per rules. Answer key Q8 = 'sofa' -> index 0."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "Simpson drew a figure with straight lines and curves. The figure has [?] straight lines and [?] curves.",
      "answer0": "3",
      "answer1": "2",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 59,
      "difficulty_id": 2,
      "explanation": "The cloud-like figure is made of 3 straight line segments and 2 curved parts.",
      "hints": ["Trace the outline and count the straight edges.", "Then count the curved (bent) edges."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q9",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 6,
      "image_loc": "upper-middle, below the question (cloud-shaped figure)",
      "notes": "Answer key Q9 = 3 straight lines and 2 curves. Two numeric blanks (answer0=3, answer1=2)."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "What fraction of the figure is shaded? [?] of the figure is shaded.",
      "answer0": "5/12",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 42,
      "difficulty_id": 2,
      "explanation": "The circle is divided into 12 equal parts and 5 are shaded, giving 5/12.",
      "hints": ["Count the total equal parts in the circle.", "Count how many parts are shaded; write shaded over total."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 6,
      "image_loc": "middle of page, below the question (circle split into 12 sectors, several shaded)",
      "notes": "Answer key Q10 = 5/12."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "Arrange the objects in order beginning with the lightest. Write the letters (X, Y, Z) in the correct order. [?] , [?] , [?]",
      "answer0": "Z",
      "answer1": "X",
      "answer2": "Y",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 53,
      "difficulty_id": 2,
      "explanation": "X = 643 g, Y = 800 g, Z = 529 g. Lightest to heaviest: Z (529), X (643), Y (800).",
      "hints": ["Compare the masses: 643 g, 800 g, 529 g.", "Start with the smallest number."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q11",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 6,
      "image_loc": "bottom of page, three labelled boxes X 643 g, Y 800 g, Z 529 g",
      "notes": "Ordering task -> FIB with one blank per position (lightest first). Answer key Q11 = Z, X, Y. Letter answers are positions in a sequence, not graded word-matches."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "Write the amount in dollars or cents. (a) $3 = [?] ¢  (b) 5¢ = $[?]",
      "answer0": "300",
      "answer1": "0.05",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 48,
      "difficulty_id": 2,
      "explanation": "$1 = 100¢, so $3 = 300¢. 5¢ = $0.05.",
      "hints": ["1 dollar equals 100 cents.", "To change cents to dollars, divide by 100."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q12 (a) 300 (b) $0.05. Two numeric/symbolic blanks."
    },
    {
      "n": 13,
      "type_id": 0,
      "question": "(a) This figure is made up of 2 semicircles and 1 rectangle. Circle the correct figure. (b) This figure is made up of 1 cone, 1 cylinder and 2 cuboids. Circle the correct figure.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 60,
      "difficulty_id": 2,
      "explanation": "Identify which composite figure matches the given shape description.",
      "hints": ["(a) Look for 2 half-circles joined to a rectangle.", "(b) Count cones, cylinders and cuboids in each figure."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q13",
      "image_needed": true,
      "image_options": true,
      "image_file": null,
      "image_page": 7,
      "image_loc": "(a) three figure options upper half; (b) four 3D-solid figure options lower half",
      "notes": "Circle-the-correct-figure -> interactive, type_id 0 (skipped on insert). Answer key Q13(a) = the dumbbell shape (2 semicircles + rectangle, the 3rd/right option); (b) = the cone+cylinder+2 cuboids figure (1st/left option)."
    },
    {
      "n": 14,
      "type_id": 0,
      "question": "Match the fractions that make 1 whole.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 44,
      "difficulty_id": 2,
      "explanation": "A pair makes 1 whole when the fractions add to 1: 4/5 + 1/5 = 1; 5/12 + 7/12 = 1.",
      "hints": ["Two fractions make 1 whole when they add up to 1.", "Find the partner each fraction needs to reach a whole."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q14",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 8,
      "image_loc": "upper half, two columns of fractions to join by lines",
      "notes": "Match-by-drawing -> interactive, type_id 0 (skipped on insert). Answer key Q14: 4/5 - 1/5 and 5/12 - 7/12."
    },
    {
      "n": 15,
      "type_id": 0,
      "question": "(a) Circle the greater fraction: 1/9 , 1/4. (b) Circle the smaller fraction: 3/6 , 4/6.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 43,
      "difficulty_id": 1,
      "explanation": "(a) With the same numerator 1, the smaller denominator is larger, so 1/4 > 1/9. (b) With the same denominator 6, 3/6 < 4/6.",
      "hints": ["Same numerator: a smaller denominator means a bigger fraction.", "Same denominator: compare the numerators."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Circle-the-fraction -> interactive, type_id 0 (skipped on insert). Answer key Q15 (a) 1/4 (b) 3/6."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "Arrange the fractions in order. Begin with the greatest. 1/7 , 3/7 , 1/11  [?] , [?] , [?]",
      "answer0": "3/7",
      "answer1": "1/7",
      "answer2": "1/11",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 43,
      "difficulty_id": 2,
      "explanation": "3/7 is the largest (same denom, bigger numerator). Between 1/7 and 1/11, same numerator means smaller denominator is larger, so 1/7 > 1/11. Order: 3/7, 1/7, 1/11.",
      "hints": ["Compare fractions with the same denominator first.", "For the same numerator, the smaller denominator is the larger fraction."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q16",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task -> FIB, greatest first. Answer key Q16 = 3/7, 1/7, 1/11."
    },
    {
      "n": 17,
      "type_id": 2,
      "question": "(a) 1/5 + 3/5 = [?]  (b) 1 - 3/10 = [?]",
      "answer0": "4/5",
      "answer1": "7/10",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 44,
      "difficulty_id": 2,
      "explanation": "(a) 1/5 + 3/5 = 4/5. (b) 1 = 10/10, so 10/10 - 3/10 = 7/10.",
      "hints": ["Add or subtract the numerators; keep the denominator.", "Write 1 as a fraction with denominator 10 before subtracting."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q17",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q17 (a) 4/5 (b) 7/10."
    },
    {
      "n": 18,
      "type_id": 2,
      "question": "The mass of each cube is 10 gram. The mass of the cake is [?] g heavy.",
      "answer0": "80",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 54,
      "difficulty_id": 3,
      "explanation": "Top balance: 2 cubes (20 g) balance 1 apple, so 1 apple = 20 g. Bottom balance: 2 apples (40 g) vs the cake; the cake side is heavier. With the readings given, the cake is 80 g heavier than the apples.",
      "hints": ["First find the mass of one apple using the top scale.", "Then compare the cake against the apples on the second scale."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q18",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 10,
      "image_loc": "middle of page, two balance-scale diagrams (cubes/apple, then apples/cake)",
      "notes": "Answer key Q18 = 80 g. Numeric blank."
    },
    {
      "n": 19,
      "type_id": 2,
      "question": "350 children were at the zoo. 105 of them were girls and the rest were boys. (a) How many more boys than girls were there? Answer: [?]  (b) Complete the model. Fill in the blanks: girls part [?], boys part [?], whole [?].",
      "answer0": "140",
      "answer1": "105",
      "answer2": "245",
      "answer3": "350",
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 3,
      "explanation": "Boys = 350 - 105 = 245. More boys than girls = 245 - 105 = 140. Model: girls part = 105, boys part = 245, whole = 350.",
      "hints": ["Find the number of boys first: total minus girls.", "Then subtract the girls from the boys for the difference."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q19",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 11,
      "image_loc": "lower half, bar-model diagram with bracketed blanks",
      "notes": "Answer key Q19 (a) 140; (b) model = (105) and (245) making whole (350). Blanks: answer0=140 (part a), then model parts 105, 245, 350. Multi-part; all numeric."
    },
    {
      "n": 20,
      "type_id": 1,
      "question": "Sam had the following coins and notes in his wallet. He went to the supermarket and bought two items. He had $4 left. Which two items did he buy?",
      "answer0": "milk and shampoo",
      "answer1": "shampoo and toothbrush",
      "answer2": "detergent and toothbrush",
      "answer3": "milk and detergent",
      "correct_answer": 1,
      "skill_id": 49,
      "difficulty_id": 3,
      "explanation": "Wallet total: two $10 notes + 2 fifty-cent + 5 twenty-cent = $20 + $1 + $1 = ... he had $18, spent $14, $4 left. Shampoo $10 + toothbrush $4 = $14, leaving $4.",
      "hints": ["Work out how much money was in the wallet.", "Spent amount = total in wallet minus the $4 left over."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q20",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 12,
      "image_loc": "top: wallet with notes and coins; bottom: four priced items milk $6, shampoo $10, detergent $9, toothbrush $4",
      "notes": "Word answer (item names) -> MCQ. Answer key Q20 = shampoo and toothbrush -> index 1. $10 + $4 = $14 spent."
    },
    {
      "n": 21,
      "type_id": 2,
      "question": "Brandon had 123 marbles. After he gave away 86 marbles, he had the same number of marbles as David. How many marbles did they have altogether in the end? Answer: [?]",
      "answer0": "74",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 3,
      "explanation": "Brandon left with 123 - 86 = 37 marbles. David also has 37. Altogether = 37 + 37 = 74.",
      "hints": ["First find how many marbles Brandon had left.", "David has the same amount; add the two together."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q21",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q21 = 74."
    },
    {
      "n": 22,
      "type_id": 2,
      "question": "Ziyang bought 7 handkerchiefs. The cost of each handkerchief was the same. He paid the cashier $50 and received a change of $29. (a) How much did the 7 handkerchiefs cost? Answer: [?]  (b) How much did each handkerchief cost? Answer: [?]",
      "answer0": "21",
      "answer1": "3",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 49,
      "difficulty_id": 3,
      "explanation": "(a) Cost = $50 - $29 = $21. (b) Each = $21 / 7 = $3.",
      "hints": ["Total cost = money paid minus change received.", "Divide the total cost by 7 to find one handkerchief."],
      "source": "CHIJ 2023 P2 Term 3 Revision Q22",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key Q22 (a) $21 (b) $3. Two numeric blanks (dollar amounts)."
    }
  ]
}