{
  "paper": {
    "school": "Pei Hwa Presbyterian Primary School",
    "year": 2024,
    "level": "P3",
    "label": "Weighted Assessment 1",
    "source_prefix": "Pei Hwa 2024 P3 Weighted Assessment 1",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "In 4985, which digit is in the thousands place?",
      "answer0": "9",
      "answer1": "8",
      "answer2": "5",
      "answer3": "4",
      "correct_answer": 3,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "In 4985 the digits from the right are: 5 ones, 8 tens, 9 hundreds, 4 thousands. So the digit in the thousands place is 4.",
      "hints": ["Read place values from the right: ones, tens, hundreds, thousands.", "The leftmost digit of a 4-digit number is in the thousands place."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q1",
      "image_needed": false,
      "image_options": false,
      "notes": "Key: option 4."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "7854 = 7000 + 800 + [?] + 4\nWhat is the missing number in the box?",
      "answer0": "5000",
      "answer1": "500",
      "answer2": "50",
      "answer3": "5",
      "correct_answer": 2,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "Expanded form of 7854 is 7000 + 800 + 50 + 4. The tens digit is 5, worth 50. So the missing number is 50.",
      "hints": ["Break 7854 into thousands, hundreds, tens and ones.", "The 5 is in the tens place, so it stands for 50, not 5."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q2",
      "image_needed": false,
      "image_options": false,
      "notes": "Key: option 3 (50). Box ? is part of the printed expanded-form expression, not a figure."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Which of the following is true?",
      "answer0": "101 > 110",
      "answer1": "970 < 410",
      "answer2": "8420 < 8220",
      "answer3": "7052 > 7025",
      "correct_answer": 3,
      "skill_id": 68,
      "difficulty_id": 1,
      "explanation": "Compare each: 101 < 110 (false); 970 > 410 (false); 8420 > 8220 (false); 7052 > 7025 because the tens digit 5 > 2 (true). So option 4 is correct.",
      "hints": ["Compare numbers digit by digit from the left.", "For 7052 vs 7025, the thousands and hundreds match; compare the tens digits."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q3",
      "image_needed": false,
      "image_options": false,
      "notes": "Key: option 4."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Mrs Lee wants to buy the dress. She has only $35. How much more money does she need?",
      "answer0": "$14.90",
      "answer1": "$19.90",
      "answer2": "$29.90",
      "answer3": "$89.90",
      "correct_answer": 1,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "The dress costs $54.90. Mrs Lee has $35. She needs $54.90 - $35 = $19.90 more.",
      "hints": ["Subtract the money she has from the price of the dress.", "$54.90 - $35.00 = $19.90."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q4",
      "image_needed": true,
      "image_page": 2,
      "image_loc": "right of the question, a dress with a $54.90 price tag",
      "image_bbox": [0.55, 0.27, 0.78, 0.37],
      "image_options": false,
      "notes": "Key: option 2. Dress price $54.90 appears only in the figure."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "Four boys were asked to solve the question below.\nFind the difference between 270 and 5092.\nWhich boy's answer was correct?",
      "answer0": "Alex",
      "answer1": "Ben",
      "answer2": "Caleb",
      "answer3": "Don",
      "correct_answer": 0,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "\"Difference\" means subtraction: 5092 - 270 = 4822. Alex got 4822 (correct). Caleb got 4722 (wrong subtraction); Ben and Don added instead of subtracting. So Alex is correct.",
      "hints": ["The difference between two numbers means you subtract.", "Compute 5092 - 270 and see which boy matches."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q5",
      "image_needed": true,
      "image_page": 2,
      "image_loc": "boxed working of the four boys' answers, middle of page",
      "image_bbox": [0.14, 0.45, 0.73, 0.71],
      "image_options": false,
      "notes": "Key: option 1 (Alex). Figure shows each boy's handwritten column working."
    },
    {
      "n": 6,
      "type_id": 2,
      "question": "Write eight thousand and five in numerals.",
      "answer0": "8005",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 67,
      "difficulty_id": 1,
      "explanation": "Eight thousand = 8000, and five = 5 ones. There are no hundreds or tens, so write 0 in those places: 8005.",
      "hints": ["Eight thousand is 8000.", "Fill empty hundreds and tens places with 0: 8005."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q6",
      "image_needed": false,
      "image_options": false,
      "notes": "Key: 8005. Numeral answer, kept as numeric FIB."
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "Look at the following number pattern. What are the missing numbers?\n[?] , [?] , 283, 287, 291, 295",
      "answer0": "275",
      "answer1": "279",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 1,
      "explanation": "The numbers increase by 4 each time (283, 287, 291, 295). Working backwards: 283 - 4 = 279 and 279 - 4 = 275. So the missing numbers are 275 and 279.",
      "hints": ["Find the difference between consecutive numbers (287 - 283 = 4).", "Subtract 4 from 283 to find the number before it, then again."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q7",
      "image_needed": false,
      "image_options": false,
      "notes": "Key: 275, 279. Two empty boxes precede the sequence; rendered as two ordered blanks."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "Subtract 17 from 3000",
      "answer0": "2983",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "3000 - 17 = 2983.",
      "hints": ["\"Subtract 17 from 3000\" means 3000 - 17.", "Regroup across the zeros: 3000 - 17 = 2983."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q8",
      "image_needed": false,
      "image_options": false,
      "notes": "Key: 2983."
    },
    {
      "n": 9,
      "type_id": 0,
      "question": "Kelly forms some numbers from the digits 5, 2, 1.\nEach of the statement is either true or false. Put a tick to indicate your answer.\na) She can form three different odd numbers.\nb) The smallest even number she can form is 152.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 66,
      "difficulty_id": 2,
      "explanation": "a) False: an odd 3-digit number must end in 1 or 5 (the odd digits). Ending in 1 gives 251, 521; ending in 5 gives 125, 215 — more than three are possible, but the smallest set check shows she can form four odd numbers, not exactly three, so the statement (exactly three) is False. b) True: an even number must end in 2; the smallest is 152.",
      "hints": ["An odd number ends in an odd digit (1 or 5); an even number ends in an even digit (2).", "For the smallest even number, end in 2 and put the smaller digits in front: 1 5 2."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q9",
      "image_needed": true,
      "image_page": 4,
      "image_loc": "three digit cards 5, 2, 1 below the question stem",
      "image_bbox": [0.30, 0.11, 0.52, 0.16],
      "image_options": false,
      "notes": "Key: a) False, b) True. True/False tick-table is interactive (no app type), so type_id 0; answers recorded here. Digit cards 5,2,1 are a figure."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Sally bought a bag and a calculator. How much did she pay in total?\nAns: $[?]",
      "answer0": "97.40",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "The bag costs $68.50 and the calculator costs $28.90. Total = $68.50 + $28.90 = $97.40.",
      "hints": ["Add the two prices together.", "$68.50 + $28.90 = $97.40."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q10",
      "image_needed": true,
      "image_page": 4,
      "image_loc": "right of the question, a bag tagged $68.50 and a calculator tagged $28.90",
      "image_bbox": [0.57, 0.37, 0.82, 0.50],
      "image_options": false,
      "notes": "Key: 68.50+28.90 = 97.40. Prices appear only in the figure."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "Hannah and Oliver had the same amount of money. Hannah bought a burger and she had $0.40 left. Oliver bought a packet of fries and he had $1.20 left.\na) Which food item cost more?\nb) How much more did that food item cost?",
      "answer0": "burger",
      "answer1": "0.80",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "They started with the same amount. Hannah had less left ($0.40 vs $1.20), so her item (the burger) cost more. The difference in money left is $1.20 - $0.40 = $0.80, so the burger cost $0.80 more.",
      "hints": ["The person with less money left spent more, so their item cost more.", "Subtract the two amounts left: $1.20 - $0.40 = $0.80."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q11",
      "image_needed": false,
      "image_options": false,
      "notes": "Key: a) burger, b) $0.80 (1.20-0.40). answer0 is a word answer in a 2-blank short-answer item; part a is a definite value (the named item), so kept as FIB per the convert-to-FIB rule."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "At a carnival, there were 1782 children. There were 562 fewer adults than children.\na) How many adults were there?\nb) How many people were there at the carnival altogether?",
      "answer0": "1220",
      "answer1": "3002",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 2,
      "explanation": "a) Adults = children - 562 = 1782 - 562 = 1220. b) Altogether = children + adults = 1782 + 1220 = 3002.",
      "hints": ["\"562 fewer adults than children\" means adults = 1782 - 562.", "Total people = number of children + number of adults."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q12",
      "image_needed": false,
      "image_options": false,
      "notes": "Key: a) 1220, b) 1782+1220 = 3002. Two-part ordered blanks."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Jack had 120 more stickers than Megan at first. After Jack gave 456 stickers to Megan, he was left with 214 stickers.\na) How many stickers did Jack have at first?\nb) How many stickers did Megan have at first?",
      "answer0": "670",
      "answer1": "550",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 3,
      "explanation": "a) Before giving away 456, Jack had 214 + 456 = 670 stickers. b) Megan had 120 fewer than Jack at first: 670 - 120 = 550 stickers.",
      "hints": ["To find Jack's starting amount, add back the 456 he gave away to the 214 he had left.", "Megan had 120 fewer than Jack at first, so subtract 120."],
      "source": "Pei Hwa 2024 P3 Weighted Assessment 1 Q13",
      "image_needed": false,
      "image_options": false,
      "notes": "Key: a) 214+456 = 670, b) 670-120 = 550. Two-part ordered blanks."
    }
  ]
}