{
  "paper": {
    "school": "Tao Nan",
    "year": 2024,
    "level": "P3",
    "label": "Revision",
    "source_prefix": "Tao Nan 2024 P3 Revision",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "The value of the digit 9 in 5920 is [?].",
      "answer0": "9",
      "answer1": "90",
      "answer2": "900",
      "answer3": "9000",
      "correct_answer": 2,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "In 5920, the digit 9 is in the hundreds place, so its value is 9 × 100 = 900.",
      "hints": ["Identify which place the digit 9 sits in.", "9 is in the hundreds column."],
      "source": "Tao Nan 2024 P3 Revision Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key = option (3) = 900. Verified."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "What is the difference between 9733 and 250 ?",
      "answer0": "9483",
      "answer1": "9523",
      "answer2": "9583",
      "answer3": "9983",
      "correct_answer": 0,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "9733 − 250 = 9483.",
      "hints": ["Difference means subtract.", "9733 − 250."],
      "source": "Tao Nan 2024 P3 Revision Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key = option (1) = 9483. Verified."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Which of the following does not have the same value as 1/2 ?",
      "answer0": "2/6",
      "answer1": "4/8",
      "answer2": "5/10",
      "answer3": "6/12",
      "correct_answer": 0,
      "skill_id": 77,
      "difficulty_id": 2,
      "explanation": "4/8, 5/10 and 6/12 all simplify to 1/2. 2/6 simplifies to 1/3, so it is not equal to 1/2.",
      "hints": ["Simplify each fraction.", "2/6 = 1/3, not 1/2."],
      "source": "Tao Nan 2024 P3 Revision Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key = option (1) = 2/6. Verified."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Which of the following fractions is the greatest?",
      "answer0": "2/3",
      "answer1": "3/4",
      "answer2": "5/6",
      "answer3": "7/12",
      "correct_answer": 2,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "Using denominator 12: 2/3 = 8/12, 3/4 = 9/12, 5/6 = 10/12, 7/12 = 7/12. The greatest is 10/12 = 5/6.",
      "hints": ["Convert all to a common denominator of 12.", "Compare the numerators."],
      "source": "Tao Nan 2024 P3 Revision Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key = option (3) = 5/6. Verified."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "The time now is 3.20 p.m. What time was it 25 minutes ago?",
      "answer0": "2.20 p.m.",
      "answer1": "2.55 p.m.",
      "answer2": "3.25 p.m.",
      "answer3": "3.45 p.m.",
      "correct_answer": 1,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "25 minutes before 3.20 p.m.: 3.20 − 20 min = 3.00 p.m., then − 5 min = 2.55 p.m.",
      "hints": ["Subtract 25 minutes from 3.20 p.m.", "Cross back over the hour."],
      "source": "Tao Nan 2024 P3 Revision Q5",
      "image_needed": true,
      "image_page": 4,
      "image_loc": "centre of page, clock face below the question stem",
      "image_options": false,
      "image_file": "q5.png",
      "notes": "Key = option (2) = 2.55 p.m. Verified. Clock illustration is decorative but accompanies the question."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "Study the lines carefully. Which line is parallel to XY?",
      "answer0": "PQ",
      "answer1": "RS",
      "answer2": "UT",
      "answer3": "VW",
      "correct_answer": 3,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "Line VW runs in the same direction as XY and never meets it, so VW is parallel to XY.",
      "hints": ["Parallel lines never cross and have the same slant.", "Compare each line's direction to XY."],
      "source": "Tao Nan 2024 P3 Revision Q6",
      "image_needed": true,
      "image_page": 5,
      "image_loc": "top of page, diagram of intersecting labelled lines below the question",
      "image_options": false,
      "image_file": "q6.png",
      "notes": "Key = option (4) = VW. Verified against figure (requires the line diagram)."
    },
    {
      "n": 7,
      "type_id": 1,
      "question": "What is the mass of the bag of rice?",
      "answer0": "230 g",
      "answer1": "260 g",
      "answer2": "2300 g",
      "answer3": "2600 g",
      "correct_answer": 3,
      "skill_id": 85,
      "difficulty_id": 2,
      "explanation": "The pointer is between 2 and 3 kg, just past 2.6 kg on the scale. 2.6 kg = 2600 g.",
      "hints": ["Read the kg scale, the needle is between 2 and 3.", "Convert kilograms to grams (× 1000)."],
      "source": "Tao Nan 2024 P3 Revision Q7",
      "image_needed": true,
      "image_page": 5,
      "image_loc": "lower half of page, weighing-scale dial with rice bag below the question",
      "image_options": false,
      "image_file": "q7.png",
      "notes": "Key = option (4) = 2600 g. Requires the scale figure to read the needle."
    },
    {
      "n": 8,
      "type_id": 1,
      "question": "The figure is made up of a rectangle and a triangle. Find the perimeter of the figure.",
      "answer0": "34 cm",
      "answer1": "43 cm",
      "answer2": "50 cm",
      "answer3": "57 cm",
      "correct_answer": 1,
      "skill_id": 96,
      "difficulty_id": 2,
      "explanation": "Outer sides: top 10 + bottom 10 + left 7 + two triangle slants 8 + 8 = 43 cm. The inner 7 cm dashed line is shared and not part of the perimeter.",
      "hints": ["Add only the outer edges, not the shared dashed line.", "10 + 10 + 7 + 8 + 8."],
      "source": "Tao Nan 2024 P3 Revision Q8",
      "image_needed": true,
      "image_page": 6,
      "image_loc": "upper half of page, rectangle-plus-triangle figure with labelled sides below the question",
      "image_options": false,
      "image_file": "q8.png",
      "notes": "Key = option (2) = 43 cm. Verified."
    },
    {
      "n": 9,
      "type_id": 1,
      "question": "The figure is made up of 7 identical squares. Find the area of the figure.",
      "answer0": "175 cm2",
      "answer1": "140 cm2",
      "answer2": "25 cm2",
      "answer3": "80 cm2",
      "correct_answer": 0,
      "skill_id": 97,
      "difficulty_id": 2,
      "explanation": "Each square has side 5 cm, so area = 5 × 5 = 25 cm². 7 squares × 25 = 175 cm².",
      "hints": ["Area of one square = side × side = 5 × 5.", "Multiply by 7 squares."],
      "source": "Tao Nan 2024 P3 Revision Q9",
      "image_needed": true,
      "image_page": 6,
      "image_loc": "lower half of page, L-shaped figure of 7 squares with 5 cm marked below the question",
      "image_options": false,
      "image_file": "q9.png",
      "notes": "Key = option (1) = 175 cm2. Verified."
    },
    {
      "n": 10,
      "type_id": 1,
      "question": "The graph shows the number of watermelons a fruit seller sold at a funfair. Fruit Sellers B, C and D sold [?] watermelons altogether.",
      "answer0": "56",
      "answer1": "48",
      "answer2": "14",
      "answer3": "12",
      "correct_answer": 1,
      "skill_id": 64,
      "difficulty_id": 2,
      "explanation": "Each picture = 4 watermelons. B has 3, C has 4, D has 5, total 12 pictures. 12 × 4 = 48.",
      "hints": ["Count the watermelon pictures for B, C and D.", "Each picture stands for 4."],
      "source": "Tao Nan 2024 P3 Revision Q10",
      "image_needed": true,
      "image_page": 7,
      "image_loc": "upper half of page, picture graph of watermelons per fruit seller below the question",
      "image_options": false,
      "image_file": "q10.png",
      "notes": "Key = option (2) = 48. B=3, C=4, D=5 pictures (12 total) × 4 = 48. Verified."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "What is the missing number in the box?\n2852 + 60[?]1 = 8923",
      "answer0": "7",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "8923 − 2852 = 6071, so the second addend is 6071. The boxed (tens) digit is 7.",
      "hints": ["Subtract 2852 from 8923 to find the missing addend.", "6071 — the digit in the box is 7."],
      "source": "Tao Nan 2024 P3 Revision Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key = 7. Vertical addition with a single missing tens digit; rendered inline. Verified."
    },
    {
      "n": 12,
      "type_id": 1,
      "question": "Mr Wong bought two shirts. He gave the cashier $140 and received $3.40 as change. Which two shirts did he buy? (Shirt A = $64.25, Shirt B = $66.90, Shirt C = $72.35)",
      "answer0": "Shirt A and Shirt B",
      "answer1": "Shirt A and Shirt C",
      "answer2": "Shirt B and Shirt C",
      "answer3": "Shirt A, Shirt B and Shirt C",
      "correct_answer": 1,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "Cost = $140 − $3.40 = $136.60. Shirt A + Shirt C = $64.25 + $72.35 = $136.60.",
      "hints": ["Find the total spent: 140 − 3.40.", "Which two prices add to 136.60?"],
      "source": "Tao Nan 2024 P3 Revision Q12",
      "image_needed": true,
      "image_page": 8,
      "image_loc": "lower half of page, three shirts with price tags below the question",
      "image_options": false,
      "image_file": "q12.png",
      "notes": "Key = Shirt C and Shirt A. Converted to MCQ (word answer). Prices folded into stem since they are on the figure; figure still recorded. Verified."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Mark wants to shade 3/4 of the figure. How many more squares must be shaded?\n[?]",
      "answer0": "6",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 41,
      "difficulty_id": 3,
      "explanation": "Per the official key the answer is 6 squares.",
      "hints": ["Work out how many squares make 3/4 of the whole figure.", "Subtract the squares already shaded."],
      "source": "Tao Nan 2024 P3 Revision Q13",
      "image_needed": true,
      "image_page": 9,
      "image_loc": "top of page, grid of squares with some shaded below the question",
      "image_options": false,
      "image_file": "q13.png",
      "notes": "Key = 6. Answer depends on the printed grid/shading (figure required); the visible grid renders ambiguously, so trusting the official key value of 6."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "Edwin studied from 3.10 p.m. to 4.55 p.m. How long did he study?\n[?] h [?] min",
      "answer0": "1",
      "answer1": "45",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 92,
      "difficulty_id": 2,
      "explanation": "From 3.10 p.m. to 4.10 p.m. is 1 h; 4.10 to 4.55 is 45 min. Total = 1 h 45 min.",
      "hints": ["Count whole hours first, then the extra minutes.", "3.10 to 4.10 is 1 h, then 45 min more."],
      "source": "Tao Nan 2024 P3 Revision Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key = 1h45min. Two blanks (h and min). Verified."
    },
    {
      "n": 15,
      "type_id": 1,
      "question": "Is the angle greater or smaller than a right angle?",
      "answer0": "greater",
      "answer1": "smaller",
      "answer2": "equal to a right angle",
      "answer3": "cannot be determined",
      "correct_answer": 0,
      "skill_id": 99,
      "difficulty_id": 1,
      "explanation": "The angle opens wider than 90 degrees, so it is greater than a right angle.",
      "hints": ["Compare the opening of the angle to a square corner (90°).", "Wider than 90° means greater."],
      "source": "Tao Nan 2024 P3 Revision Q15",
      "image_needed": true,
      "image_page": 9,
      "image_loc": "lower half of page, single drawn angle below the question",
      "image_options": false,
      "image_file": "q15.png",
      "notes": "Key = greater. Word answer converted to MCQ (4 options). Requires the angle figure. Verified."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "4/5 − 3/10 = [?]\nExpress your answer in the simplest form.",
      "answer0": "1/2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "4/5 = 8/10, so 8/10 − 3/10 = 5/10 = 1/2.",
      "hints": ["Make the denominators the same: 4/5 = 8/10.", "8/10 − 3/10 = 5/10, then simplify."],
      "source": "Tao Nan 2024 P3 Revision Q16",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key = 1/2. Single symbolic fraction blank. Verified."
    },
    {
      "n": 17,
      "type_id": 2,
      "question": "4 similar cylinders are placed on the balance scale. What is the mass of one cylinder?\n[?] g",
      "answer0": "180",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "4 cylinders balance 720 g, so one cylinder = 720 ÷ 4 = 180 g.",
      "hints": ["The 4 cylinders together weigh 720 g.", "Divide 720 by 4."],
      "source": "Tao Nan 2024 P3 Revision Q17",
      "image_needed": true,
      "image_page": 10,
      "image_loc": "middle of page, balance scale with cylinders on left and 720 g mass on right below the question",
      "image_options": false,
      "image_file": "q17.png",
      "notes": "Key = 180. Unit g. Verified (figure supplies the 720 g)."
    },
    {
      "n": 18,
      "type_id": 2,
      "question": "How many faces does a cube have?\n[?] faces",
      "answer0": "6",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 62,
      "difficulty_id": 1,
      "explanation": "A cube has 6 flat square faces.",
      "hints": ["Think of a die or a box.", "Count top, bottom and the four sides."],
      "source": "Tao Nan 2024 P3 Revision Q18",
      "image_needed": true,
      "image_page": 10,
      "image_loc": "lower half of page, line drawing of a cube below the question",
      "image_options": false,
      "image_file": "q18.png",
      "notes": "Key = 6. Cube image is illustrative. Verified."
    },
    {
      "n": 19,
      "type_id": 0,
      "question": "Fandi, Sundram and David ran a total of 20 rounds around a running track. Sundram ran the greatest number of rounds. Complete the picture graph by filling in the names, Sundram and Fandi.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 63,
      "difficulty_id": 2,
      "explanation": "Each footprint = 2 rounds. The tallest column (6 footprints = 12 rounds) is Sundram; the middle column (3 footprints = 6 rounds) is Fandi; David is the shortest (1 footprint = 2 rounds). 12 + 6 + 2 = 20.",
      "hints": ["Each footprint stands for 2 rounds.", "Sundram ran the most, so label the tallest column Sundram."],
      "source": "Tao Nan 2024 P3 Revision Q19",
      "image_needed": true,
      "image_page": 11,
      "image_loc": "centre of page, footprint picture graph with three columns below the question",
      "image_options": false,
      "image_file": "q19.png",
      "notes": "Interactive label-the-graph task (no value/sequence answer) -> type_id 0, skipped on insert. Key shows tallest=Sundram, middle=Fandi, David already given. Sundram=12, Fandi=6, David=2 rounds."
    },
    {
      "n": 20,
      "type_id": 2,
      "question": "How many fewer rounds did David complete than Sundram?\n[?] rounds",
      "answer0": "10",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 64,
      "difficulty_id": 2,
      "explanation": "Sundram ran 12 rounds (6 footprints × 2) and David ran 2 rounds (1 footprint × 2). 12 − 2 = 10 fewer.",
      "hints": ["Read Sundram's and David's rounds from the graph.", "Subtract David's rounds from Sundram's."],
      "source": "Tao Nan 2024 P3 Revision Q20",
      "image_needed": true,
      "image_page": 11,
      "image_loc": "same footprint picture graph as Q19, centre of page 11",
      "image_options": false,
      "image_file": "q20.png",
      "notes": "Key = 10. Unit rounds. Depends on the Q19 picture graph (Sundram 12, David 2). Verified."
    }
  ]
}