{
  "paper": {
    "school": "Tao Nan",
    "year": 2024,
    "level": "P3",
    "label": "Weighted Assessment 3",
    "source_prefix": "Tao Nan 2024 P3 Weighted Assessment 3",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 2,
      "question": "4979 is [?] tens more than 4779.",
      "answer0": "20",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "4979 - 4779 = 200. 200 = 20 tens, so 4979 is 20 tens more than 4779.",
      "hints": ["Find the difference: 4979 - 4779.", "Divide the difference by 10 to get the number of tens."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 20"
    },
    {
      "n": 2,
      "type_id": 2,
      "question": "Form the smallest 4-digit odd number using all the digits 3 , 1 , 0 , 8.",
      "answer0": "1083",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 67,
      "difficulty_id": 2,
      "explanation": "An odd number must end in an odd digit (1 or 3). To be smallest, the leading digit must be as small as possible but not 0, so use 1 first. Remaining digits 0, 8, 3 arranged smallest with an odd units digit: 0, 8, then 3 (odd) -> 1083.",
      "hints": ["The number must end in an odd digit (1 or 3).", "The first digit cannot be 0; make it as small as possible."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 1083"
    },
    {
      "n": 3,
      "type_id": 2,
      "question": "What is the missing number in the box?",
      "answer0": "676",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "The division shows [box] divided by 9 gives quotient 75 remainder 1. So [box] = 9 x 75 + 1 = 675 + 1 = 676.",
      "hints": ["Dividend = divisor x quotient + remainder.", "Compute 9 x 75 then add the remainder 1."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q3",
      "image_needed": true,
      "image_page": 3,
      "image_loc": "below the question number, a long-division layout showing quotient 7 5 R1, divisor 9 and an empty box for the dividend",
      "image_bbox": [0.24, 0.55, 0.47, 0.63],
      "image_options": false,
      "image_file": "q3.png",
      "notes": "Key: 676"
    },
    {
      "n": 4,
      "type_id": 2,
      "question": "Mary has 3 fifty-cent coins, 17 ten-cent coins and 12 five-cent coins in her coin box. How much money does Mary have in her coin box?",
      "answer0": "3.80",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 82,
      "difficulty_id": 2,
      "explanation": "3 x 50c = 150c = $1.50; 17 x 10c = 170c = $1.70; 12 x 5c = 60c = $0.60. Total = $1.50 + $1.70 + $0.60 = $3.80.",
      "hints": ["Work out the value of each set of coins separately.", "Add the three amounts: $1.50 + $0.60 + $1.70."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 1.5+0.6+1.70=3.80; answer $3.80. Answer requires unit $; stored as 3.80"
    },
    {
      "n": 5,
      "type_id": 2,
      "question": "How much pocket money did Jane have at first?",
      "answer0": "24",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "The bar of Jane's total pocket money is divided into 4 equal units. One unit (the part marked 'Spent') is $6. So the whole = 4 x $6 = $24.",
      "hints": ["The bar is split into 4 equal parts; one part is $6.", "Total = 4 x $6."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q5",
      "image_needed": true,
      "image_page": 4,
      "image_loc": "model/bar diagram labelled 'Jane's pocket money' split into 4 equal units, first unit shows $6 with a brace labelled 'Spent'",
      "image_bbox": [0.19, 0.31, 0.54, 0.44],
      "image_options": false,
      "image_file": "q5.png",
      "notes": "Key: 24 ($24). Answer requires unit $; stored as 24"
    },
    {
      "n": 6,
      "type_id": 2,
      "question": "What digit does the heart represent?",
      "answer0": "4",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 75,
      "difficulty_id": 3,
      "explanation": "The multiplication is 1 [heart] 7 x 6 = 882. So 1[heart]7 = 882 / 6 = 147. The tens digit is 4, so the heart represents 4.",
      "hints": ["Divide the product 882 by 6 to find the 3-digit number.", "Read off the tens digit of that number."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q6",
      "image_needed": true,
      "image_page": 4,
      "image_loc": "vertical multiplication: 1 [heart] 7 multiplied by 6, with product 8 8 2 written below the line",
      "image_bbox": [0.2, 0.66, 0.49, 0.81],
      "image_options": false,
      "image_file": "q6.png",
      "notes": "Key: 4. Heart appears in stem and figure; figure shows the column multiplication 1?7 x 6 = 882"
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "Study the following pattern and find the missing number.",
      "answer0": "17",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "Each box shows two bottom numbers whose sum is the top number: 3+6=9 (top 18 = 2x9)... check: top = sum of the two bottom numbers doubled. 3+6=9, 18=2x9; 5+8=13, but top is 40 not 26. Instead top = product + sum: 3x6=18; 5x8=40; 8x11=88; 9x?=153, so ?=153/9=17.",
      "hints": ["Look at how the top number relates to the two bottom numbers (try multiplying them).", "3x6=18, 5x8=40, 8x11=88, so 9x?=153."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q7",
      "image_needed": true,
      "image_page": 5,
      "image_loc": "four linked boxes; each has a top number (18, 40, 88, 153) over two bottom numbers (3 and 6; 5 and 8; 8 and 11; 9 and ?)",
      "image_bbox": [0.12, 0.11, 0.82, 0.18],
      "image_options": false,
      "image_file": "q7.png",
      "notes": "Key: 17. Rule: top = product of the two bottom numbers (9 x 17 = 153)"
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "The sum of two numbers is 430. The smaller number is 120. What is the greater number?",
      "answer0": "310",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 1,
      "explanation": "Greater number = sum - smaller number = 430 - 120 = 310.",
      "hints": ["Sum minus the smaller number gives the greater number.", "430 - 120."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 310"
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "How much do the following items cost altogether?",
      "answer0": "4.90",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 82,
      "difficulty_id": 1,
      "explanation": "Burger costs $4.30 and ice cream costs $0.60. Altogether = $4.30 + $0.60 = $4.90.",
      "hints": ["Add the two prices shown.", "$4.30 + $0.60."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q9",
      "image_needed": true,
      "image_page": 5,
      "image_loc": "boxed picture of a burger priced $4.30 and an ice cream cone priced $0.60",
      "image_bbox": [0.19, 0.64, 0.46, 0.79],
      "image_options": false,
      "image_file": "q9.png",
      "notes": "Key: 4.90 ($4.90). Answer requires unit $; stored as 4.90"
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Divide 754 by 4. What is the remainder?",
      "answer0": "2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "754 / 4 = 188 remainder 2 (since 4 x 188 = 752, and 754 - 752 = 2).",
      "hints": ["Do the long division 754 / 4.", "The remainder is what is left after 4 x 188 = 752."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 2. Page shows a blank working grid only (no figure needed for the question)"
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "Haron and Bala have 192 stamps altogether. Bala has 3 times as many stamps as Haron. How many stamps does Haron have?",
      "answer0": "48",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "Haron is 1 unit, Bala is 3 units, total 4 units = 192. 1 unit = 192 / 4 = 48. Haron has 48 stamps.",
      "hints": ["Haron = 1 unit, Bala = 3 units, so total = 4 units.", "192 / 4 = number Haron has."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 192/4 = 48. Original asks to draw a model (1 mark); modelled here as numeric answer"
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "On Sunday, 3015 people visited Chinatown. On Monday, 1527 fewer people visited Chinatown than on Sunday. How many people visited Chinatown on both days?",
      "answer0": "4503",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 2,
      "explanation": "Monday = 3015 - 1527 = 1488. Both days = 3015 + 1488 = 4503.",
      "hints": ["First find Monday's number: 3015 - 1527.", "Add Sunday and Monday together."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 3015-1527=1488; 3015+1488=4503"
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Gopal baked 72 cookies. He put them equally onto 8 trays. After giving away some trays of cookies, he had 45 cookies left. How many trays of cookies had he left?",
      "answer0": "5",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "Each tray has 72 / 8 = 9 cookies. He had 45 cookies left, so 45 / 9 = 5 trays left.",
      "hints": ["Find how many cookies are on one tray: 72 / 8.", "Divide the cookies left (45) by the cookies per tray."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 72/8=9, 45/9=5, Ans 5. Bar model on page is just working aid; not required to answer"
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "Roy had $30. His father then gave him some money. After spending $15 on a storybook, Roy had $38 left. How much money did Roy receive from his father?",
      "answer0": "23",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "Before spending, Roy had 38 + 15 = $53. He started with $30, so his father gave him 53 - 30 = $23.",
      "hints": ["Add back what he spent: $38 + $15 to find what he had after his father gave money.", "Subtract his starting $30 from that total."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 38+15=53 (working shown as 30-15=15, 38-15=23); answer $23. Answer requires unit $; stored as 23"
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "Study the pattern. Complete the table: Figure 1 has 2 triangles, Figure 3 has 6, Figure 5 has 10. Figure 2 has [?] triangles, Figure 4 has [?] triangles. Figure [?] has 20 triangles.",
      "answer0": "4",
      "answer1": "8",
      "answer2": "10",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 2,
      "explanation": "Number of triangles = 2 x figure number. Figure 2: 2x2=4; Figure 4: 2x4=8. For 20 triangles, 2 x figure = 20, so figure = 10.",
      "hints": ["Each figure adds 2 more triangles than the previous one.", "Number of triangles = 2 x figure number; for 20 triangles divide by 2."],
      "source": "Tao Nan 2024 P3 Weighted Assessment 3 Q15",
      "image_needed": true,
      "image_page": 9,
      "image_loc": "boxed row of triangle figures: Figure 1 (single triangle), Figure 3 (3 joined triangles), Figure 5 (5 joined triangles), with '?' marks for Figure 2 and Figure 4",
      "image_bbox": [0.18, 0.11, 0.82, 0.22],
      "image_options": false,
      "image_file": "q15.png",
      "notes": "Key: (a) Fig2=4, Fig4=8; (b) draw Figure 2 (two triangles); (c) Figure 10. Combined parts (a) and (c) into 3-blank FIB; part (b) draw-Figure-2 is interactive and omitted (the value answers are captured)."
    }
  ]
}