{
  "paper": {
    "school": "Anglo-Chinese School (Primary)",
    "year": 2023,
    "level": "P3",
    "label": "Weighted Assessment",
    "source_prefix": "ACS Primary 2023 P3 Weighted Assessment",
    "has_answer_key": true,
    "notes": "PDF contains three quizzes (Quiz 1: Whole numbers & Money; Quiz 2: Multiplication Tables, Multiplication & Division & Word Problems; Quiz 3: Fractions, Length, Mass & Bar Graphs). Each quiz restarts numbering in the paper; questions are renumbered sequentially 1-42 here. Answer key on PDF pages 27-28."
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "Which number is 10 tens less than 5467?",
      "answer0": "4467",
      "answer1": "5367",
      "answer2": "5457",
      "answer3": "5568",
      "correct_answer": 1,
      "skill_id": 66,
      "difficulty_id": 2,
      "explanation": "10 tens = 100. 5467 - 100 = 5367.",
      "hints": ["10 tens means 10 x 10 = 100.", "Subtract 100 from 5467."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q1. Key: option (2) 5367."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "The value of the digit 3 in 3412 is [?].",
      "answer0": "3000",
      "answer1": "300",
      "answer2": "3",
      "answer3": "30",
      "correct_answer": 0,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "In 3412, the digit 3 is in the thousands place, so its value is 3000.",
      "hints": ["Identify the place value of 3.", "3 is in the thousands place."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q2. Key: option (1) 3000."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "9 thousands and 7 tens is the same as [?].",
      "answer0": "9710",
      "answer1": "9700",
      "answer2": "9070",
      "answer3": "9007",
      "correct_answer": 2,
      "skill_id": 66,
      "difficulty_id": 2,
      "explanation": "9 thousands = 9000, 7 tens = 70. Total = 9070.",
      "hints": ["9 thousands = 9000.", "7 tens = 70; add them."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q3. Key: option (3) 9070."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Which number is 10 more than 6467?",
      "answer0": "7467",
      "answer1": "6567",
      "answer2": "6477",
      "answer3": "6468",
      "correct_answer": 2,
      "skill_id": 65,
      "difficulty_id": 1,
      "explanation": "6467 + 10 = 6477.",
      "hints": ["Add 10 to 6467.", "Only the tens digit changes."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q4. Key: option (3) 6477."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "In the number 2340, which digit is in the tens place?",
      "answer0": "0",
      "answer1": "2",
      "answer2": "3",
      "answer3": "4",
      "correct_answer": 3,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "In 2340, the tens place is occupied by 4.",
      "hints": ["The tens place is second from the right.", "Read the digit in the tens column."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q5. Key: option (4) 4."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "Write 3712 in words.",
      "answer0": "three thousand, seven hundred and twelve",
      "answer1": "three thousand, seven hundred and twenty",
      "answer2": "thirty-seven thousand and twelve",
      "answer3": "three thousand and seventy-twelve",
      "correct_answer": 0,
      "skill_id": 67,
      "difficulty_id": 1,
      "explanation": "3712 = 3 thousands, 7 hundreds, 1 ten, 2 ones = three thousand, seven hundred and twelve.",
      "hints": ["Break 3712 into thousands, hundreds, tens and ones.", "12 reads as twelve."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q6a (write in words). Converted to MCQ per word-answer rule. Key: three thousand, seven hundred and twelve."
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "Write nine thousand, six hundred and six in numerals. [?]",
      "answer0": "9606",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 67,
      "difficulty_id": 1,
      "explanation": "Nine thousand = 9000, six hundred = 600, six = 6. Total = 9606.",
      "hints": ["Write the thousands, hundreds and ones.", "There are no tens, so put 0 in the tens place."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q6b (write in numerals). Numeric FIB. Key: 9606."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "Arrange the following numbers from the greatest to the smallest.\n6806 , 6068 , 6680\n[?] , [?] , [?]",
      "answer0": "6806",
      "answer1": "6680",
      "answer2": "6068",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 68,
      "difficulty_id": 2,
      "explanation": "Compare digit by digit: 6806 > 6680 > 6068.",
      "hints": ["Compare the hundreds digit after the thousands.", "Order largest first."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q7 (ordering greatest to smallest). Converted to FIB. Key: 6806, 6680, 6068."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "Write the missing number in the number pattern.\n2649 , 2799 , 2949 , [?] , 3249",
      "answer0": "3099",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 2,
      "explanation": "The pattern increases by 150 each time. 2949 + 150 = 3099.",
      "hints": ["Find the difference between consecutive terms.", "Each term is 150 more than the one before."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q8 (number pattern). Numeric FIB. Key: 3099."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Find the sum of 2839 and 197. [?]",
      "answer0": "3036",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "2839 + 197 = 3036.",
      "hints": ["Sum means add.", "Line up the digits and add with regrouping."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q9. Key: 2839 + 197 = 3036."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "Find the difference between 3001 and 549. [?]",
      "answer0": "2452",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 2,
      "explanation": "3001 - 549 = 2452.",
      "hints": ["Difference means subtract.", "Regroup across the zeros."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q10. Key: 3001 - 549 = 2452."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "The difference between two numbers is 279. The greater number is 866. Find the smaller number. [?]",
      "answer0": "587",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 2,
      "explanation": "Smaller number = 866 - 279 = 587.",
      "hints": ["Difference = greater - smaller.", "So smaller = greater - difference."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q11. Key: 866 - 279 = 587."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Mrs Tan bought a blanket for $36.60. She bought a bedsheet for $29.90. How much did Mrs Tan pay for the two items altogether?\n$[?]",
      "answer0": "66.50",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 1,
      "explanation": "$36.60 + $29.90 = $66.50.",
      "hints": ["Altogether means add.", "Add the dollars and cents, regrouping the cents."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q12. Key: $36.60 + $29.90 = $66.50."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "A plastic box costs $13.50. The plastic box costs $6.90 less than a water bottle. How much does the water bottle cost?\n$[?]",
      "answer0": "20.40",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 2,
      "explanation": "Water bottle = $13.50 + $6.90 = $20.40.",
      "hints": ["The box is cheaper, so the bottle costs more.", "Add $6.90 to $13.50."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q13. Key: $13.50 + $6.90 = $20.40."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "A shirt cost $39.90. During a sale Mr Lee paid $27.50 for it. How much did Mr Lee save?\n$[?]",
      "answer0": "12.40",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 1,
      "explanation": "Savings = $39.90 - $27.50 = $12.40.",
      "hints": ["Savings = original price - price paid.", "Subtract $27.50 from $39.90."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q14. Key: $39.90 - $27.50 = $12.40."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "Moses had $30. He bought a box of crayons for $15.90. How much did he have left?\n$[?]",
      "answer0": "14.10",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 83,
      "difficulty_id": 1,
      "explanation": "Left = $30.00 - $15.90 = $14.10.",
      "hints": ["Left means subtract what he spent.", "$30.00 - $15.90."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q16",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 1 Q15. Key: $30.00 - $15.90 = $14.10."
    },
    {
      "n": 17,
      "type_id": 1,
      "question": "There are 16 sweets in a box. How many sweets are there in 8 such boxes?",
      "answer0": "8",
      "answer1": "2",
      "answer2": "24",
      "answer3": "128",
      "correct_answer": 3,
      "skill_id": 75,
      "difficulty_id": 1,
      "explanation": "16 x 8 = 128 sweets.",
      "hints": ["Multiply sweets per box by number of boxes.", "16 x 8."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q17",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q1. Key: option (4) 128."
    },
    {
      "n": 18,
      "type_id": 1,
      "question": "Which of the following has the same value of 4 x 7?",
      "answer0": "7 x 7 x 7 x 7",
      "answer1": "7 + 7 + 7 + 7",
      "answer2": "4 + 4 + 4 + 4",
      "answer3": "4 x 4 x 4 x 4 x 4 x 4 x 4",
      "correct_answer": 1,
      "skill_id": 73,
      "difficulty_id": 2,
      "explanation": "4 x 7 means 7 added 4 times: 7 + 7 + 7 + 7 = 28.",
      "hints": ["4 x 7 means four groups of 7.", "Repeated addition of 7 four times."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q18",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q2. Key: option (2) 7 + 7 + 7 + 7."
    },
    {
      "n": 19,
      "type_id": 1,
      "question": "Ben spends $28 on buying some cartons of milk.\n1 carton for $4\nHow many cartons of milk can he get?",
      "answer0": "32",
      "answer1": "24",
      "answer2": "7",
      "answer3": "4",
      "correct_answer": 2,
      "skill_id": 76,
      "difficulty_id": 1,
      "explanation": "$28 div $4 per carton = 7 cartons.",
      "hints": ["Divide total money by cost per carton.", "28 div 4."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q19",
      "image_needed": true,
      "image_page": 10,
      "image_loc": "middle of page, below the question: drawing of a milk carton with a label box reading '1 carton for $4'",
      "image_options": false,
      "image_file": "q19.png",
      "notes": "Quiz 2 Q3. Figure shows milk carton + price label. Key: option (3) 7."
    },
    {
      "n": 20,
      "type_id": 1,
      "question": "When a number is divided by 9, it has a remainder of 6. Which of the following is a possible number?",
      "answer0": "54",
      "answer1": "66",
      "answer2": "72",
      "answer3": "78",
      "correct_answer": 3,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "A number with remainder 6 when divided by 9 fits 9k + 6. Testing: 54 = 9x6 r0; 66 = 9x7 r3; 72 = 9x8 r0; 78 = 9x8 + 6, remainder 6. So 78 is the possible number.",
      "hints": ["A number with remainder 6 when divided by 9 fits 9k + 6.", "Check each option: divide by 9 and read the remainder."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q20",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q4. Key (page 27) marks option (4) 78, which is correct: 78 = 9x8 + 6 (remainder 6)."
    },
    {
      "n": 21,
      "type_id": 1,
      "question": "Sandra has 3 times as many stamps as Mary. They have 288 stamps altogether. How many stamps does Mary have?",
      "answer0": "72",
      "answer1": "96",
      "answer2": "216",
      "answer3": "285",
      "correct_answer": 0,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "Mary = 1 unit, Sandra = 3 units, total 4 units = 288. 1 unit = 288 div 4 = 72.",
      "hints": ["Let Mary be 1 unit and Sandra 3 units.", "Total is 4 units = 288; find 1 unit."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q21",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q5. Key: option (1) 72."
    },
    {
      "n": 22,
      "type_id": 2,
      "question": "[?] ÷ 8 = 5",
      "answer0": "40",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 73,
      "difficulty_id": 1,
      "explanation": "Missing number = 5 x 8 = 40.",
      "hints": ["Use the relationship between multiplication and division.", "5 x 8 = the number."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q22",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q6a. Key: (a) 40."
    },
    {
      "n": 23,
      "type_id": 2,
      "question": "[?] × 7 = 42",
      "answer0": "6",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 73,
      "difficulty_id": 1,
      "explanation": "Missing number = 42 div 7 = 6.",
      "hints": ["Divide 42 by 7.", "Which number times 7 gives 42?"],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q23",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q6b. Key: (b) 6."
    },
    {
      "n": 24,
      "type_id": 2,
      "question": "Ben had some marbles. He gave all his marbles to 4 friends. Each friend received 12 marbles. How many marbles did Ben have at first? [?]",
      "answer0": "48",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 1,
      "explanation": "4 friends x 12 marbles = 48 marbles.",
      "hints": ["Total = friends x marbles each.", "4 x 12."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q24",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q7. Key: 12 x 4 = 48."
    },
    {
      "n": 25,
      "type_id": 2,
      "question": "Find the missing number.\n2 [?] 9\n×    8\n2 2 3 2",
      "answer0": "7",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 75,
      "difficulty_id": 3,
      "explanation": "2 _ 9 x 8 = 2232, so 2 _ 9 = 2232 div 8 = 279. The missing tens digit is 7.",
      "hints": ["Divide the product 2232 by 8.", "2232 div 8 = 279, so the boxed digit is 7."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q25",
      "image_needed": true,
      "image_page": 12,
      "image_loc": "middle-lower part of page: a vertical multiplication layout with a boxed '?' as the tens digit of the top 3-digit number (2 ? 9), x 8, product 2232",
      "image_options": false,
      "image_file": "q25.png",
      "notes": "Quiz 2 Q8. Figure is the column-multiplication with boxed missing digit. Key: 2232 div 8 = 279, missing digit = 7."
    },
    {
      "n": 26,
      "type_id": 2,
      "question": "Mr Lee had 246 packets of erasers. Each packet had 9 erasers in it. How many erasers were there altogether? [?]",
      "answer0": "2214",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 75,
      "difficulty_id": 2,
      "explanation": "246 x 9 = 2214 erasers.",
      "hints": ["Multiply packets by erasers per packet.", "246 x 9."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q26",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q9. Key: 246 x 9 = 2214."
    },
    {
      "n": 27,
      "type_id": 2,
      "question": "Mrs Tan had 259 eggs. She packed 5 eggs in each tray. How many eggs were left unpacked? [?]",
      "answer0": "4",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 74,
      "difficulty_id": 2,
      "explanation": "259 div 5 = 51 remainder 4. So 4 eggs were left unpacked.",
      "hints": ["Divide 259 by 5.", "The remainder is the number left unpacked."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q27",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q10. Key: 259 div 5 = 51 R4, so 4 unpacked."
    },
    {
      "n": 28,
      "type_id": 2,
      "question": "An oven cost $256 in Shop A. The same oven cost twice as much in Shop B. What was the cost of the oven in Shop B?\n$[?]",
      "answer0": "512",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 1,
      "explanation": "Twice as much = $256 x 2 = $512.",
      "hints": ["Twice means multiply by 2.", "256 x 2."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q28",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q11a. Key: 256 x 2 = $512."
    },
    {
      "n": 29,
      "type_id": 2,
      "question": "An oven cost $256 in Shop A. The same oven cost twice as much in Shop B. Mary had $400. How much change will she receive if she bought an oven from Shop A?\n$[?]",
      "answer0": "144",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "Change = $400 - $256 = $144.",
      "hints": ["Change = money given - cost.", "$400 - $256."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q29",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q11b. Key: 400 - 256 = $144."
    },
    {
      "n": 30,
      "type_id": 2,
      "question": "Jeremy gets $20 of pocket money every day. He spends $13 every day and saves the rest. How many days will Jeremy take to save a total of $476? [?]",
      "answer0": "68",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "Saves $20 - $13 = $7 per day. $476 div $7 = 68 days.",
      "hints": ["Find daily savings: $20 - $13.", "Divide $476 by the daily savings."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q30",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q12. Key: 20-13=7; 476 div 7 = 68 days."
    },
    {
      "n": 31,
      "type_id": 2,
      "question": "John sold 523 apples. He sold 155 fewer apples than Jim. Tom sold 3 times as many apples as Jim. How many apples did Tom sell? [?]",
      "answer0": "2034",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "Jim = 523 + 155 = 678. Tom = 678 x 3 = 2034 apples.",
      "hints": ["John sold 155 fewer than Jim, so Jim = 523 + 155.", "Tom = 3 x Jim."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q31",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 2 Q13. Key: 523+155=678; 678 x 3 = 2034."
    },
    {
      "n": 32,
      "type_id": 1,
      "question": "1 half = [?] eighths",
      "answer0": "6",
      "answer1": "2",
      "answer2": "8",
      "answer3": "4",
      "correct_answer": 3,
      "skill_id": 77,
      "difficulty_id": 1,
      "explanation": "1/2 = 4/8, so 1 half = 4 eighths.",
      "hints": ["Make an equivalent fraction with denominator 8.", "1/2 = ?/8."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q32",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 3 Q1. MCQ (has 4 numeric options, kept as MCQ). Key: option (4) 4."
    },
    {
      "n": 33,
      "type_id": 1,
      "question": "What is the mass of the bag of rice?",
      "answer0": "3 kg 4 g",
      "answer1": "3 kg 40 g",
      "answer2": "3 kg 400 g",
      "answer3": "3 kg 500 g",
      "correct_answer": 2,
      "skill_id": 85,
      "difficulty_id": 2,
      "explanation": "The needle points between 3 and 4 kg at the 0.4 kg mark, i.e. 3 kg 400 g.",
      "hints": ["Read the kg scale on the dial.", "Each small division is part of a kilogram."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q33",
      "image_needed": true,
      "image_page": 18,
      "image_loc": "upper-middle of page, below the question: a bag of rice on a dial weighing scale marked 0,1,2,3 kg with the needle past 3 kg",
      "image_options": false,
      "image_file": "q33.png",
      "notes": "Quiz 3 Q2. Figure = weighing scale with rice bag. Key: option (3) 3 kg 400 g."
    },
    {
      "n": 34,
      "type_id": 1,
      "question": "Which of the following has the greatest mass?",
      "answer0": "17 kg",
      "answer1": "807 g",
      "answer2": "8700 g",
      "answer3": "1 kg 70 g",
      "correct_answer": 0,
      "skill_id": 86,
      "difficulty_id": 2,
      "explanation": "Convert to grams: 17 kg = 17000 g; 807 g; 8700 g; 1 kg 70 g = 1070 g. Largest is 17 kg.",
      "hints": ["Convert all masses to the same unit (grams).", "Compare the gram values."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q34",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 3 Q3. Key: option (1) 17 kg."
    },
    {
      "n": 35,
      "type_id": 1,
      "question": "Ali walked a total distance of 1 km 100 m from his home to school. Which point is his school at?",
      "answer0": "A",
      "answer1": "B",
      "answer2": "C",
      "answer3": "D",
      "correct_answer": 2,
      "skill_id": 87,
      "difficulty_id": 3,
      "explanation": "From Home it is 930 m to the junction. 1 km 100 m = 1100 m total, so the second leg = 1100 - 930 = 170 m. The 170 m path leads to point C.",
      "hints": ["1 km 100 m = 1100 m.", "Subtract the 930 m first leg to find the remaining distance, then match the path length."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q35",
      "image_needed": true,
      "image_page": 19,
      "image_loc": "upper half of page, below the question: a map with Home connected by a winding 930 m path to a junction, from which dotted paths of 80 m (to A), 250 m (to B), 170 m (to C) and 270 m (to D) branch out",
      "image_options": false,
      "image_file": "q35.png",
      "notes": "Quiz 3 Q4. Figure = map of paths with distances. Key: option (3) C. (930 + 170 = 1100 m = 1 km 100 m.)"
    },
    {
      "n": 36,
      "type_id": 2,
      "question": "Find the missing numerator and denominator.\n3/8 = [?]/24 = 18/[?]",
      "answer0": "9",
      "answer1": "48",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 80,
      "difficulty_id": 2,
      "explanation": "3/8 = 9/24 (x3) and 3/8 = 18/48 (x6). So (a) = 9, (b) = 48.",
      "hints": ["8 x 3 = 24, so multiply the numerator by 3.", "18 div 3 numerator means 8 x 6 = 48."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q36",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 3 Q5. Two blanks (a)=numerator over 24, (b)=denominator under 18. Key: (a) 9, (b) 48."
    },
    {
      "n": 37,
      "type_id": 2,
      "question": "Arrange the fractions in order. Begin with the smallest.\n2/9 , 3/4 , 7/8 , 1/2\n[?] , [?] , [?] , [?]",
      "answer0": "2/9",
      "answer1": "1/2",
      "answer2": "3/4",
      "answer3": "7/8",
      "correct_answer": null,
      "skill_id": 79,
      "difficulty_id": 3,
      "explanation": "As decimals: 2/9 ≈ 0.22, 1/2 = 0.5, 3/4 = 0.75, 7/8 = 0.875. Smallest to largest: 2/9, 1/2, 3/4, 7/8.",
      "hints": ["Convert each fraction to a decimal or common denominator.", "Order from smallest to largest."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q37",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 3 Q6 (ordering smallest first). Converted to FIB. Key: 2/9, 1/2, 3/4, 7/8."
    },
    {
      "n": 38,
      "type_id": 2,
      "question": "Express in metres.\n5 km 20 m = [?] m",
      "answer0": "5020",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 86,
      "difficulty_id": 2,
      "explanation": "5 km = 5000 m, plus 20 m = 5020 m.",
      "hints": ["1 km = 1000 m.", "5 x 1000 + 20."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q38",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 3 Q7. Key: 5 km 20 m = 5020 m."
    },
    {
      "n": 39,
      "type_id": 2,
      "question": "The bar graph shows the number of stamps Ahmad, Betty, Chong Ming and Devi collected. They collected 330 stamps altogether. How many stamps did Chong Ming collect? [?]",
      "answer0": "80",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 2,
      "explanation": "Ahmad 50 + Betty 80 + Devi 120 = 250. Chong Ming = 330 - 250 = 80.",
      "hints": ["Read Ahmad, Betty and Devi from the bars.", "Subtract their total from 330."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q39",
      "image_needed": true,
      "image_page": 21,
      "image_loc": "lower half of page: bar graph titled 'Stamps Collected' with bars for Ahmad (50), Betty (80), an empty Chong Ming column, and Devi (120); y-axis 'Number of stamps' 0-140",
      "image_options": false,
      "image_file": "q39.png",
      "notes": "Quiz 3 Q8. Original task 'Complete the bar graph' reworded to compute Chong Ming's count (a value). Figure = bar graph. Key: 50+80+120=250; 330-250=80."
    },
    {
      "n": 40,
      "type_id": 2,
      "question": "Find the difference between 1/3 and 5/6. Give your answer in its simplest form. [?]",
      "answer0": "1/2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "1/3 = 2/6. 5/6 - 2/6 = 3/6 = 1/2.",
      "hints": ["Make the denominators the same: 1/3 = 2/6.", "Subtract, then simplify."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q40",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 3 Q9. Key: 5/6 - 2/6 = 3/6 = 1/2."
    },
    {
      "n": 41,
      "type_id": 2,
      "question": "The distance between School A and School C is 942 m. The distance between School A and School C is 3 times the distance between School B and School C. What is the distance between School B and School C?\n[?] m",
      "answer0": "314",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 2,
      "explanation": "B to C = 942 div 3 = 314 m.",
      "hints": ["A-C is 3 times B-C.", "So B-C = 942 div 3."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q41",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 3 Q10a. Key: 942 div 3 = 314 m."
    },
    {
      "n": 42,
      "type_id": 2,
      "question": "Siti wants to walk from the library to the school. What is the shortest distance that she needs to walk from the library to the school?\n[?] m",
      "answer0": "3158",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 3,
      "explanation": "Via Park: 1300 + 1904 = 3204 m. Via Cinema: 2055 + 1103 = 3158 m. The shorter route is 3158 m.",
      "hints": ["There are two routes: through the Park or through the Cinema.", "Add each route's distances and pick the smaller total."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q42",
      "image_needed": true,
      "image_page": 23,
      "image_loc": "lower half of page: a network diagram with Library connected to Park (1300 m) and to Cinema (2055 m); Park to School (1904 m); Cinema to School (1103 m)",
      "image_options": false,
      "image_file": "q42.png",
      "notes": "Quiz 3 Q10b. Figure = route diagram (Library/Park/School/Cinema with distances). Key: 2055 + 1103 = 3158 m."
    },
    {
      "n": 43,
      "type_id": 2,
      "question": "The bar graph shows the number of movie tickets sold in a cinema over 4 days. How many tickets were sold on Day 1 and Day 4 altogether? [?]",
      "answer0": "66",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 1,
      "explanation": "Day 1 = 32, Day 4 = 34. 32 + 34 = 66.",
      "hints": ["Read the Day 1 and Day 4 bars.", "Add the two values."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q43",
      "image_needed": true,
      "image_page": 24,
      "image_loc": "upper part of page: bar graph titled 'Tickets Sold in a Cinema' with bars Day 1 (32), Day 2 (24), Day 3 (40), Day 4 (34); y-axis 'Number of tickets sold' 0-44",
      "image_options": false,
      "image_file": "q43.png",
      "notes": "Quiz 3 Q11a. Figure = bar graph. Key: 32+34=66."
    },
    {
      "n": 44,
      "type_id": 2,
      "question": "The bar graph shows the number of movie tickets sold in a cinema over 4 days. How many more tickets were sold on Day 3 than Day 2? [?]",
      "answer0": "16",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 104,
      "difficulty_id": 1,
      "explanation": "Day 3 = 40, Day 2 = 24. 40 - 24 = 16.",
      "hints": ["Read the Day 3 and Day 2 bars.", "Subtract Day 2 from Day 3."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q44",
      "image_needed": true,
      "image_page": 24,
      "image_loc": "upper part of page: same bar graph 'Tickets Sold in a Cinema' (Day 1=32, Day 2=24, Day 3=40, Day 4=34)",
      "image_options": false,
      "image_file": "q44.png",
      "notes": "Quiz 3 Q11b. Shares the bar graph with Q43. Key: 40-24=16."
    },
    {
      "n": 45,
      "type_id": 2,
      "question": "Gopal ate 3/10 of a pizza. His sister ate 1/5 of the same pizza. How much more pizza did Gopal eat than his sister? [?]",
      "answer0": "1/10",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "1/5 = 2/10. 3/10 - 2/10 = 1/10.",
      "hints": ["Make the denominators the same: 1/5 = 2/10.", "Subtract the two tenths."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q45",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 3 Q12a. Key: 3/10 - 2/10 = 1/10."
    },
    {
      "n": 46,
      "type_id": 2,
      "question": "Gopal ate 3/10 of a pizza. His sister ate 1/5 of the same pizza. Gopal ate another 2/5 of the pizza. What fraction of the pizza did he eat in total? [?]",
      "answer0": "7/10",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "2/5 = 4/10. 3/10 + 4/10 = 7/10.",
      "hints": ["Convert 2/5 to tenths: 2/5 = 4/10.", "Add to the 3/10 he already ate."],
      "source": "ACS Primary 2023 P3 Weighted Assessment Q46",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Quiz 3 Q12b. Key: 3/10 + 4/10 = 7/10."
    }
  ]
}