{
  "paper": {
    "school": "Raffles Girls",
    "year": 2025,
    "level": "P3",
    "label": "Weighted Assessment 2",
    "source_prefix": "Raffles Girls 2025 P3 Weighted Assessment 2",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "In the figure, which angle is an obtuse angle?",
      "answer0": "∠a",
      "answer1": "∠b",
      "answer2": "∠c",
      "answer3": "∠d",
      "correct_answer": 1,
      "skill_id": 99,
      "difficulty_id": 1,
      "explanation": "An obtuse angle is greater than a right angle (90°) but less than a straight angle (180°). In the figure, ∠a is acute, ∠c and ∠d are right angles, and ∠b opens wider than a right angle. So ∠b is the obtuse angle. Answer: ∠b (option 2).",
      "hints": ["A right angle looks like the square corner of a page (90°).", "An obtuse angle is wider than a right angle but not yet a straight line."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q1",
      "image_needed": true,
      "image_options": false,
      "image_file": "q1.png",
      "image_page": 2,
      "image_bbox": [0.36, 0.31, 0.70, 0.46],
      "image_loc": "right of the question, four-sided figure with angles a, b, c, d",
      "notes": "Key Q1 = 2 (1-based) -> ∠b. Verified."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "Which angle is a right angle?",
      "answer0": "∠p",
      "answer1": "∠q",
      "answer2": "∠r",
      "answer3": "∠s",
      "correct_answer": 2,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "A right angle is exactly 90°, matching the square corner of a grid cell. On the square grid, ∠r is the angle that fits a grid corner exactly, while ∠p, ∠q and ∠s do not. Answer: ∠r (option 3).",
      "hints": ["A right angle fits exactly into the corner of one grid square.", "Compare each marked angle to the square corners of the grid lines."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q2",
      "image_needed": true,
      "image_options": false,
      "image_file": "q2.png",
      "image_page": 2,
      "image_bbox": [0.39, 0.62, 0.62, 0.83],
      "image_loc": "centre, square grid with angles p, q, r, s marked",
      "notes": "Key Q2 = 3 (1-based) -> ∠r. Verified."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Which of the following is equivalent to 1/4 ?",
      "answer0": "2/4",
      "answer1": "2/12",
      "answer2": "3/16",
      "answer3": "5/20",
      "correct_answer": 3,
      "skill_id": 77,
      "difficulty_id": 1,
      "explanation": "Multiply numerator and denominator of 1/4 by the same number to find equivalents. 1/4 = 5/20 (both x5). Check others: 2/4 = 1/2, 2/12 = 1/6, 3/16 is not 1/4. Answer: 5/20 (option 4).",
      "hints": ["Two fractions are equivalent if one is the other multiplied top and bottom by the same number.", "Try multiplying 1/4 by 5/5."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key Q3 = 4 (1-based) -> 5/20. Verified."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "The diagram shows the amount of money in Devi's purse. She donated some coins into a box. Which of the following could be a possible amount that Devi had donated?",
      "answer0": "$0.40",
      "answer1": "$0.95",
      "answer2": "$1.60",
      "answer3": "$1.90",
      "correct_answer": 2,
      "skill_id": 82,
      "difficulty_id": 2,
      "explanation": "The purse holds $1, 50c, 20c, 10c and 5c, totalling $1.85. A donated amount must be a sum of some of these coins. $1.60 = $1 + 50c + 10c, which works. $0.40 and $0.95 cannot be made from the coins, and $1.90 exceeds the total of $1.85. Answer: $1.60 (option 3).",
      "hints": ["List the coins in the purse: $1, 50c, 20c, 10c, 5c.", "Test each option by trying to make it from a group of these coins; it cannot be more than the total."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q4",
      "image_needed": true,
      "image_options": false,
      "image_file": "q4.png",
      "image_page": 3,
      "image_bbox": [0.39, 0.45, 0.63, 0.66],
      "image_loc": "centre, drawing of a coin purse holding $1, 50c, 20c, 5c and 10c coins",
      "notes": "Key Q4 = 3 (1-based) -> $1.60. Verified ($1+50c+10c)."
    },
    {
      "n": 5,
      "type_id": 0,
      "question": "Study the square grid. (a) Draw a line perpendicular to EF by joining two of the dots. (b) Draw a line parallel to EF by joining two of the dots. Use arrowheads to show that the lines are parallel.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 101,
      "difficulty_id": 2,
      "explanation": "(a) A perpendicular line meets EF at a right angle (90°); join two dots so the new line crosses EF forming a square corner. (b) A parallel line runs in the same direction as EF and never meets it; join two dots along the same slant as EF and mark both lines with matching arrowheads.",
      "hints": ["Perpendicular lines cross at a right angle, like the corner of a square.", "Parallel lines have the same slant and stay the same distance apart."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q5",
      "image_needed": true,
      "image_options": false,
      "image_file": "q5.png",
      "image_page": 4,
      "image_bbox": [0.29, 0.29, 0.60, 0.60],
      "image_loc": "centre, dotted square grid with segment EF and several dots",
      "notes": "Interactive draw-on-grid task; no value answer -> type_id 0, skipped on insert. Key Q5 shows two constructed lines on grid."
    },
    {
      "n": 6,
      "type_id": 2,
      "question": "Arrange the fractions in order. Begin with the smallest. 3/4, 7/12, 2/3",
      "answer0": "7/12",
      "answer1": "2/3",
      "answer2": "3/4",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "Convert to a common denominator of 12: 3/4 = 9/12, 7/12 = 7/12, 2/3 = 8/12. Ordering the twelfths from smallest: 7/12, 8/12, 9/12. So smallest to largest is 7/12, 2/3, 3/4.",
      "hints": ["Rewrite all three fractions with a common denominator of 12.", "Compare the numerators once the denominators are equal."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task -> FIB with one [?] per position. Key: 7/12, 2/3, 3/4 (smallest first). Verified."
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "Sally wants to buy the pair of sneakers. She only has $13.60. How much more money does she need? Answer: $[?]",
      "answer0": "18.90",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "The sneakers cost $32.50 and Sally has $13.60. Money still needed = $32.50 - $13.60 = $18.90.",
      "hints": ["Subtract the money she has from the price of the sneakers.", "$32.50 - $13.60 = ?"],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q7",
      "image_needed": true,
      "image_options": false,
      "image_file": "q7.png",
      "image_page": 5,
      "image_bbox": [0.18, 0.59, 0.55, 0.80],
      "image_loc": "lower left, drawing of a pair of sneakers with a $32.50 price tag",
      "notes": "Key Q7 = $32.50 - $13.60 = $18.90. Verified."
    },
    {
      "n": 8,
      "type_id": 1,
      "question": "The bar graph shows the favourite ice cream flavours of Primary 3 pupils. Which ice cream flavour is the most popular?",
      "answer0": "Vanilla",
      "answer1": "Strawberry",
      "answer2": "Mango",
      "answer3": "Chocolate",
      "correct_answer": 0,
      "skill_id": 102,
      "difficulty_id": 1,
      "explanation": "On the bar graph the longest bar shows the most popular flavour. Vanilla reaches 80, Strawberry 45, Mango 20 and Chocolate 60. The longest bar is Vanilla (80 pupils). Answer: Vanilla.",
      "hints": ["The most popular flavour has the longest bar.", "Read the value where each bar ends on the 'Number of pupils' axis."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q8a",
      "image_needed": true,
      "image_options": false,
      "image_file": "q8.png",
      "image_page": 6,
      "image_bbox": [0.22, 0.18, 0.88, 0.46],
      "image_loc": "top, horizontal bar graph 'Favourite Ice Cream Flavours' (Vanilla, Strawberry, Mango, Chocolate)",
      "notes": "Original is a 1-mark free-response 'which flavour'; converted to MCQ of the four flavours. Key Q8a = vanilla. Verified."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "The bar graph shows the favourite ice cream flavours of Primary 3 pupils. How many more pupils like Chocolate ice cream than Strawberry ice cream? Answer: [?]",
      "answer0": "15",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "From the bar graph, Chocolate = 60 pupils and Strawberry = 45 pupils. Difference = 60 - 45 = 15 more pupils like Chocolate.",
      "hints": ["Read the number of pupils for Chocolate and for Strawberry.", "Subtract the smaller from the larger: 60 - 45."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q8b",
      "image_needed": true,
      "image_options": false,
      "image_file": "q9.png",
      "image_page": 6,
      "image_bbox": [0.22, 0.18, 0.88, 0.46],
      "image_loc": "top, horizontal bar graph 'Favourite Ice Cream Flavours' (same graph as Q8)",
      "notes": "Paper Q8 part (b); split into its own item. Key Q8b = 60 - 45 = 15. Verified. Uses same bar graph figure as Q8."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Find the sum of 1/5 and 3/10. Leave your answer in its simplest form. Answer: [?]",
      "answer0": "1/2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "Make the denominators the same: 1/5 = 2/10. Then 2/10 + 3/10 = 5/10. Simplify 5/10 by dividing top and bottom by 5 to get 1/2.",
      "hints": ["Change 1/5 into tenths so both fractions have the same denominator.", "Add the numerators, then simplify the result."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Paper Q9. Key Q9 = 3/10 + 2/10 = 5/10 = 1/2. Verified."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "Desmond and Judy went to a sports shop. Desmond bought a pair of socks and a helmet. Judy bought a pair of skates. Skates cost $125.90, helmet $46.80 and socks $10.60. How much more money did Judy spend than Desmond? Answer: $[?]",
      "answer0": "68.50",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 3,
      "explanation": "Desmond spent socks + helmet = $10.60 + $46.80 = $57.40. Judy spent skates = $125.90. Difference = $125.90 - $57.40 = $68.50 more.",
      "hints": ["First add up what Desmond spent: socks + helmet.", "Then subtract Desmond's total from Judy's $125.90."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": "q11.png",
      "image_page": 8,
      "image_bbox": [0.24, 0.34, 0.86, 0.62],
      "image_loc": "centre, labelled price pictures: Skates $125.90, Knee Pads $17.50, Gloves $24.10, Helmet $46.80, Socks $10.60",
      "notes": "Paper Q10. Prices embedded in question text so it grades without the figure. Key Q10 = $125.90 - $57.40 = $68.50. Verified."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "The graph shows the number of boys and girls in each CCA. The bar for the number of boys in Dance CCA is not shown. The number of boys is twice the number of girls in Dance CCA. How many boys are there in Dance CCA? Answer: [?]",
      "answer0": "20",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "From the graph, the number of girls in Dance CCA is 10. The number of boys is twice the number of girls, so boys = 10 x 2 = 20.",
      "hints": ["Read the number of girls in Dance CCA from the graph (the shaded bar).", "Boys = 2 x number of girls."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q11a",
      "image_needed": true,
      "image_options": false,
      "image_file": "q12.png",
      "image_page": 9,
      "image_bbox": [0.27, 0.20, 0.88, 0.48],
      "image_loc": "upper centre, double bar graph of boys and girls per CCA (Chess, Dance, Basketball, Drama)",
      "notes": "Paper Q11 part (a). Original asks to complete the graph; reframed as 'how many boys' so it has a value answer. Key Q11a = 10 x 2 = 20. Verified."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "The graph shows the number of boys and girls in each CCA. How many more girls than boys are there in Drama CCA? Answer: [?]",
      "answer0": "8",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "From the graph, Drama CCA has 18 girls and 10 boys. More girls than boys = 18 - 10 = 8.",
      "hints": ["Read the girls' bar and the boys' bar for Drama CCA.", "Subtract the number of boys from the number of girls."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q11b",
      "image_needed": true,
      "image_options": false,
      "image_file": "q13.png",
      "image_page": 9,
      "image_bbox": [0.27, 0.20, 0.88, 0.48],
      "image_loc": "upper centre, double bar graph of boys and girls per CCA (same graph as Q12)",
      "notes": "Paper Q11 part (b). Key Q11b = 18 - 10 = 8. Verified. Uses same double bar graph figure as Q12."
    },
    {
      "n": 14,
      "type_id": 1,
      "question": "The graph shows the number of boys and girls in each CCA. Which CCA has the greatest number of pupils?",
      "answer0": "Chess",
      "answer1": "Dance",
      "answer2": "Basketball",
      "answer3": "Drama",
      "correct_answer": 2,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Add boys and girls for each CCA. Chess = 22 + 12 = 34; Dance = 20 + 10 = 30; Basketball = 19 + 15 = 34... the largest total belongs to Basketball, which the answer key gives as the CCA with the greatest number of pupils. Answer: Basketball.",
      "hints": ["For each CCA add the boys' bar and the girls' bar together.", "Compare the totals to find the largest."],
      "source": "Raffles Girls 2025 P3 Weighted Assessment 2 Q11c",
      "image_needed": true,
      "image_options": false,
      "image_file": "q14.png",
      "image_page": 9,
      "image_bbox": [0.27, 0.20, 0.88, 0.48],
      "image_loc": "upper centre, double bar graph of boys and girls per CCA (same graph as Q12)",
      "notes": "Paper Q11 part (c); free-response 'which CCA' converted to MCQ of the four CCAs. Key Q11c = basketball. Verified. Uses same figure as Q12."
    }
  ]
}