{
  "paper": {
    "school": "Henry Park",
    "year": 2024,
    "level": "P3",
    "label": "Weighted Assessment 2",
    "source_prefix": "Henry Park 2024 P3 Weighted Assessment 2",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "The bar graph shows the number of stamps collected by 4 children.\n\nHow many stamps did Amy collect?",
      "answer0": "12",
      "answer1": "30",
      "answer2": "39",
      "answer3": "42",
      "correct_answer": 3,
      "skill_id": 102,
      "difficulty_id": 1,
      "explanation": "Read Amy's bar on the graph. The top of Amy's bar reaches 42 on the 'Number of stamps' axis, so Amy collected 42 stamps. The answer is 42.",
      "hints": ["Find Amy's bar and read where its top meets the vertical axis.", "Each gridline is spaced 6 apart; Amy's bar is just below 48 at 42."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q1",
      "image_needed": true,
      "image_page": 1,
      "image_loc": "middle of page, below the question stem",
      "image_bbox": [0.20, 0.46, 0.82, 0.69],
      "image_options": false,
      "image_file": "q1.png",
      "notes": "Bar graph: Amy=42, Bernice=9, Charlie=30, Don=39. Key Q1=option 4 (42)."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "In the figure, which angle is greater than a right angle?",
      "answer0": "Angle c",
      "answer1": "Angle d",
      "answer2": "Angle e",
      "answer3": "Angle f",
      "correct_answer": 0,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "A right angle is 90 degrees (a square corner). Comparing the marked angles to a square corner on the grid, angle c opens wider than a right angle (obtuse), while d, e and f are equal to or smaller than a right angle. The answer is Angle c.",
      "hints": ["A right angle looks like the corner of a square (90 degrees).", "Look for the angle that opens wider than a square corner."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q2",
      "image_needed": true,
      "image_page": 2,
      "image_loc": "top centre, grid with angles c, d, e, f marked",
      "image_bbox": [0.37, 0.15, 0.69, 0.39],
      "image_options": false,
      "image_file": "q2.png",
      "notes": "Grid figure with angles c,d,e,f. Key Q2=option 1 (Angle c)."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "In the figure, which two lines are perpendicular to each other?",
      "answer0": "AB and AG",
      "answer1": "AG and GF",
      "answer2": "BC and CD",
      "answer3": "CD and EF",
      "correct_answer": 1,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "Perpendicular lines meet at a right angle (90 degrees). Line AG is vertical (the left side) and line GF is horizontal (the bottom), and they meet at G forming a right angle. So AG and GF are perpendicular. The answer is AG and GF.",
      "hints": ["Perpendicular lines cross or meet at a square corner (90 degrees).", "Check the corner at G between the left side and the base."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q3",
      "image_needed": true,
      "image_page": 2,
      "image_loc": "lower centre, figure with points A, B, C, D, E, F, G",
      "image_bbox": [0.30, 0.53, 0.73, 0.76],
      "image_options": false,
      "image_file": "q3.png",
      "notes": "Figure with vertices A-G. Key Q3=option 2 (AG and GF)."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Which of the following is equivalent to 2/3?",
      "answer0": "1/3",
      "answer1": "1/2",
      "answer2": "4/6",
      "answer3": "5/6",
      "correct_answer": 2,
      "skill_id": 77,
      "difficulty_id": 1,
      "explanation": "Multiply both the numerator and denominator of 2/3 by 2: (2x2)/(3x2) = 4/6. So 4/6 is equivalent to 2/3. The answer is 4/6.",
      "hints": ["Multiply the top and bottom of 2/3 by the same number.", "2/3 = (2x2)/(3x2)."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q4=option 3 (4/6)."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "The graph shows the number of Primary 3 students who visited Sentosa last Sunday.\n\nClass [?] had the greatest number of boys who visited Sentosa.",
      "answer0": "3A",
      "answer1": "3B",
      "answer2": "3C",
      "answer3": "3D",
      "correct_answer": 1,
      "skill_id": 102,
      "difficulty_id": 1,
      "explanation": "Read the 'Boys' (shaded) bars: 3A=15, 3B=27, 3C=9, 3D=18. The tallest boys' bar is 3B at 27, so class 3B had the greatest number of boys. The answer is 3B.",
      "hints": ["Look only at the shaded 'Boys' bars, not the 'Girls' bars.", "Compare the heights of the four boys' bars and pick the tallest."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q5",
      "image_needed": true,
      "image_page": 3,
      "image_loc": "middle of page, dual bar graph (boys/girls) used for Q5 and Q6",
      "image_bbox": [0.18, 0.46, 0.87, 0.66],
      "image_options": false,
      "image_file": "q5.png",
      "notes": "Boys: 3A=15, 3B=27, 3C=9, 3D=18. Made MCQ from class options. Key Q5=3B. Shared graph with Q6."
    },
    {
      "n": 6,
      "type_id": 2,
      "question": "The graph shows the number of Primary 3 students who visited Sentosa last Sunday.\n\nThere were [?] fewer boys than girls in class 3D who visited Sentosa.",
      "answer0": "6",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 1,
      "explanation": "In class 3D, the boys' bar is 18 and the girls' bar is 24. The difference is 24 - 18 = 6, so there were 6 fewer boys than girls. The answer is 6.",
      "hints": ["Read the boys' bar and the girls' bar for class 3D.", "Subtract the number of boys from the number of girls: 24 - 18."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q6",
      "image_needed": true,
      "image_page": 3,
      "image_loc": "middle of page, dual bar graph (boys/girls) used for Q5 and Q6",
      "image_bbox": [0.18, 0.46, 0.87, 0.66],
      "image_options": false,
      "image_file": "q6.png",
      "notes": "3D: boys=18, girls=24, difference=6. Key Q6=6. Shared graph with Q5."
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "In the figure, how many of the marked angles are acute angles?",
      "answer0": "4",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "An acute angle is smaller than a right angle (less than 90 degrees). Examining the arrow-shaped figure, 4 of the marked angles are sharp (acute), while the others are right angles or larger. The answer is 4.",
      "hints": ["An acute angle is smaller than a square corner (less than 90 degrees).", "Count only the sharp, narrow marked angles."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q7",
      "image_needed": true,
      "image_page": 4,
      "image_loc": "top of page, arrow-shaped figure with marked angles",
      "image_bbox": [0.30, 0.14, 0.65, 0.32],
      "image_options": false,
      "image_file": "q7.png",
      "notes": "Arrow/star figure with marked angles; count of acute = 4. Key Q7=4."
    },
    {
      "n": 8,
      "type_id": 0,
      "question": "EF is a straight line. Draw a line parallel to EF passing through point X.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 101,
      "difficulty_id": 2,
      "explanation": "Using the square grid, line EF rises a fixed number of squares for every fixed number across (its slope). Draw a line through X that climbs at exactly the same slope (same up/across step) as EF; that line never meets EF, so it is parallel to EF.",
      "hints": ["Parallel lines have the same slant and never meet.", "Count how many squares EF goes up for each square across, then copy that slope starting from X."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q8",
      "image_needed": true,
      "image_page": 4,
      "image_loc": "lower half, square grid with line EF and point X",
      "image_bbox": [0.24, 0.46, 0.80, 0.73],
      "image_options": false,
      "image_file": "q8.png",
      "notes": "Interactive draw-on-grid task (no value answer) -> type_id 0, skipped on insert. Key Q8 = parallel line drawn through X."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "Subtract 1/12 from 3/4. Give your answer in its simplest form.",
      "answer0": "2/3",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "Convert 3/4 to twelfths: 3/4 = 9/12. Then 9/12 - 1/12 = 8/12. Simplify 8/12 by dividing top and bottom by 4 to get 2/3. The answer is 2/3.",
      "hints": ["Change 3/4 to twelfths so both fractions have denominator 12.", "9/12 - 1/12 = 8/12, then simplify."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q9: 3/4 - 1/12 = 8/12 = 2/3."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Arrange the fractions in order. Begin with the greatest.\n\n2/11, 7/9, 2/3",
      "answer0": "7/9",
      "answer1": "2/3",
      "answer2": "2/11",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "Compare the sizes: 7/9 is close to 1 (about 0.78), 2/3 is about 0.67, and 2/11 is small (about 0.18). From greatest to smallest: 7/9, 2/3, 2/11. The answer is 7/9, 2/3, 2/11.",
      "hints": ["Estimate each fraction as a decimal or compare to 1/2.", "7/9 is nearly a whole; 2/11 is far less than half."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task -> FIB with one blank per position (greatest first). Key Q10: 7/9, 2/3, 2/11."
    },
    {
      "n": 11,
      "type_id": 0,
      "question": "The bar graph shows the types of food sold in a school canteen. A group of students was asked to choose one of the five types of food as their favourite food.\n\n(a) The number of students who chose [?] as their favourite food is three times as many as the number of students who chose laksa.\n(b) What is the total number of students who chose chicken rice, pizza and nasi lemak as their favourite food?",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "From the horizontal bar graph: Chicken Rice=25, Laksa=15, Pizza=5, Nasi Lemak=50, Pasta=45. (a) Three times laksa = 3 x 15 = 45, which matches pasta, so the answer is Pasta. (b) Chicken rice + pizza + nasi lemak = 25 + 5 + 50 = 80 students.",
      "hints": ["(a) Read laksa's bar, multiply by 3, then find which food matches that length.", "(b) Add the three bar lengths: chicken rice + pizza + nasi lemak."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q11",
      "image_needed": true,
      "image_page": 6,
      "image_loc": "upper middle, horizontal bar graph of food types",
      "image_bbox": [0.16, 0.16, 0.83, 0.40],
      "image_options": false,
      "image_file": "q11.png",
      "notes": "Two-part question (fill blank + numeric). Multi-part with a non-numeric blank (a)=Pasta and numeric (b)=80 -> kept as type_id 0 (not cleanly single answer-set). Key Q11: a) pasta, b) 50+25+5=80. Bar values: Chicken Rice=25, Laksa=15, Pizza=5, Nasi Lemak=50, Pasta=45."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "Square ABCD is made up of 4 identical smaller squares. 2 of the smaller squares are cut into equal parts. What fraction of the square ABCD is shaded?",
      "answer0": "7/16",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 78,
      "difficulty_id": 3,
      "explanation": "The big square is 4 small squares; divide each into 4 equal parts so the whole is 16 equal parts. Shaded: the top-right small square has 1 of its 4 triangles shaded (1 part), the bottom-left small square has 1 of its 2 halves shaded (2 parts), and the bottom-right small square is fully shaded (4 parts). Total shaded = 1 + 2 + 4 = 7 out of 16, so 7/16.",
      "hints": ["Split the whole figure into 16 equal small parts.", "Count the shaded parts: top-right triangle, bottom-left half, and the full bottom-right square."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q12",
      "image_needed": true,
      "image_page": 7,
      "image_loc": "upper centre, square ABCD divided into 4 smaller squares with shaded regions",
      "image_bbox": [0.30, 0.18, 0.62, 0.41],
      "image_options": false,
      "image_file": "q12.png",
      "notes": "Key Q12=7/16. Shaded: 1/4 of top-right + 1/2 of bottom-left + full bottom-right, over 16 parts."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Shirley had 2 five-dollar notes. She bought 6 pens that cost 90 cents each.\n\n(a) How much money did Shirley pay for the 6 pens?\n(b) How much money did Shirley have left after buying 6 pens?",
      "answer0": "$5.40",
      "answer1": "$4.60",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "(a) Each pen costs 90 cents = $0.90. For 6 pens: $0.90 x 6 = $5.40. (b) Shirley had 2 x $5 = $10. Money left = $10 - $5.40 = $4.60.",
      "hints": ["(a) Multiply the cost of one pen ($0.90) by 6.", "(b) Two five-dollar notes make $10; subtract what she paid."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Two blanks: (a)=$5.40, (b)=$4.60. Key Q13: a) 0.9x6=5.40, b) 10-5.40=4.60."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "A packet of sugar and 8 similar packets of noodles weight 5700 g. The mass of the packet of sugar is 900 g.\n\n(a) What is the total mass of the 8 packets of noodles?\n(b) What is the mass of each packet of noodles?",
      "answer0": "4800 g",
      "answer1": "600 g",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "(a) Total mass minus the sugar gives the noodles: 5700 g - 900 g = 4800 g. (b) Divide the noodles' total by 8 packets: 4800 g / 8 = 600 g each.",
      "hints": ["(a) Subtract the sugar's mass (900 g) from the total 5700 g.", "(b) Share the noodles' total mass equally among 8 packets."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "(a)=4800 g, (b)=600 g. Key Q14: a) 5700-800=4800g (key mis-typed subtrahend as 800; printed sugar mass is 900, 5700-900=4800), b) 4800/8=600g."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "Mr Lim had 4 times as many muffins as Ms Siti. After selling 63 muffins, he had as many muffins as Ms Siti. How many muffins did Mr Lim have at first?",
      "answer0": "84",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "Let Ms Siti have 1 unit; Mr Lim has 4 units. After selling 63, Mr Lim's muffins equal Ms Siti's 1 unit, so the 63 sold equals 4 units - 1 unit = 3 units. So 1 unit = 63 / 3 = 21. Mr Lim had 4 units = 4 x 21 = 84 muffins at first. The answer is 84.",
      "hints": ["Draw Ms Siti as 1 unit and Mr Lim as 4 units.", "The 63 muffins sold equal the 3-unit difference; find 1 unit, then 4 units."],
      "source": "Henry Park 2024 P3 Weighted Assessment 2 Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q15: 63/3=21, 21x4=84."
    }
  ]
}