{
  "paper": {
    "school": "CHIJ Primary (Toa Payoh)",
    "year": 2022,
    "level": "P3",
    "label": "Weighted Assessment 1",
    "source_prefix": "CHIJ 2022 P3 Weighted Assessment 1",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "The value of the digit 6 in 6017 is [?].",
      "answer0": "6",
      "answer1": "60",
      "answer2": "600",
      "answer3": "6000",
      "correct_answer": 3,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "In 6017 the digit 6 is in the thousands place, so its value is 6000.",
      "hints": ["Identify which place the digit 6 sits in.", "6 is in the thousands place."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 4 (option 4 = 6000)."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "3891 = 3000 + [?] + 90 + 1",
      "answer0": "8 ones",
      "answer1": "8 tens",
      "answer2": "8 hundreds",
      "answer3": "8 thousands",
      "correct_answer": 2,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "3891 = 3000 + 800 + 90 + 1, so the missing part is 800, which is 8 hundreds.",
      "hints": ["Break 3891 into thousands, hundreds, tens and ones.", "The hundreds part is 800 = 8 hundreds."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 3 (option 3 = 8 hundreds)."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "4 thousands + 11 tens + 41 ones = [?]",
      "answer0": "4052",
      "answer1": "4151",
      "answer2": "4421",
      "answer3": "4520",
      "correct_answer": 1,
      "skill_id": 66,
      "difficulty_id": 2,
      "explanation": "4000 + 110 + 41 = 4151.",
      "hints": ["11 tens = 110 and 41 ones = 41.", "Add 4000 + 110 + 41."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 2 (option 2 = 4151)."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "What is the sum of 2381 and 4092?",
      "answer0": "1711",
      "answer1": "6173",
      "answer2": "6373",
      "answer3": "6473",
      "correct_answer": 3,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "2381 + 4092 = 6473.",
      "hints": ["Add the two numbers column by column.", "2381 + 4092 = 6473."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 4 (option 4 = 6473)."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "Which of the following is the smallest?",
      "answer0": "2 thousands",
      "answer1": "21 hundreds",
      "answer2": "220 tens",
      "answer3": "2022 ones",
      "correct_answer": 0,
      "skill_id": 68,
      "difficulty_id": 2,
      "explanation": "2 thousands = 2000, 21 hundreds = 2100, 220 tens = 2200, 2022 ones = 2022. The smallest is 2000.",
      "hints": ["Convert each option to a plain number.", "2000 < 2022 < 2100 < 2200."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 1 (option 1 = 2 thousands = 2000)."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "551 less than 7490 is [?].",
      "answer0": "1980",
      "answer1": "6939",
      "answer2": "6941",
      "answer3": "7141",
      "correct_answer": 1,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "7490 - 551 = 6939.",
      "hints": ["\"551 less than 7490\" means 7490 - 551.", "7490 - 551 = 6939."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 2 (option 2 = 6939)."
    },
    {
      "n": 7,
      "type_id": 1,
      "question": "Write 6495 in words.",
      "answer0": "Six thousand, four hundred and ninety-five",
      "answer1": "Six thousand, four hundred and fifty-nine",
      "answer2": "Six thousand, nine hundred and forty-five",
      "answer3": "Sixty-four thousand, nine hundred and five",
      "correct_answer": 0,
      "skill_id": 67,
      "difficulty_id": 1,
      "explanation": "6495 in words is six thousand, four hundred and ninety-five.",
      "hints": ["6 thousands, 4 hundreds, 9 tens, 5 ones.", "Read it as six thousand, four hundred and ninety-five."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Word answer converted to MCQ (4 options). Key: Six thousand, four hundred and ninety-five."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "In the number 8612, what does the digit 1 stands for?",
      "answer0": "10",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 66,
      "difficulty_id": 1,
      "explanation": "In 8612 the digit 1 is in the tens place, so it stands for 10.",
      "hints": ["Find the place of the digit 1.", "1 is in the tens place = 10."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 10."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "6852 + 2199 = [?]",
      "answer0": "9051",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "6852 + 2199 = 9051.",
      "hints": ["Add column by column with regrouping.", "6852 + 2199 = 9051."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed as a vertical addition (6852 + 2199). Key: 9051."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "Subtract 1299 from 3000.",
      "answer0": "1701",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 1,
      "explanation": "3000 - 1299 = 1701.",
      "hints": ["\"Subtract 1299 from 3000\" means 3000 - 1299.", "3000 - 1299 = 1701."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 1701."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "Find the missing number in the number pattern below.\n9297, 9247, 9227, [?], 9157, 9107, 9087",
      "answer0": "9177",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 69,
      "difficulty_id": 3,
      "explanation": "The pattern decreases by 50 then 20 alternately around the gap: 9227 - 50 = 9177, and 9177 - 20 = 9157.",
      "hints": ["Look at the steps before and after the blank.", "9227 - 50 = 9177; 9177 - 20 = 9157."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q11",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 9177."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "Arrange the following numbers from the greatest to the smallest.\n1203, 2103, 2030, 1220\ngreatest [?], [?], [?], [?]",
      "answer0": "2103",
      "answer1": "2030",
      "answer2": "1220",
      "answer3": "1203",
      "correct_answer": null,
      "skill_id": 68,
      "difficulty_id": 2,
      "explanation": "From greatest to smallest: 2103, 2030, 1220, 1203.",
      "hints": ["Compare thousands first, then hundreds, tens, ones.", "2103 > 2030 > 1220 > 1203."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task as FIB (one blank per position, greatest first). Key: 2103, 2030, 1220, 1203."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "What is the missing number in the box?\n6 0 [?] 8 - 1 7 8 5 = 4 2 5 3",
      "answer0": "3",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 70,
      "difficulty_id": 3,
      "explanation": "4253 + 1785 = 6038, so the four-digit number is 6038 and the missing digit in the box is 3.",
      "hints": ["Add the answer back: 4253 + 1785.", "4253 + 1785 = 6038, so the box digit is 3."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Vertical subtraction 60[?]8 - 1785 = 4253; missing digit in tens place. Key: 3."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "The difference between two numbers is 293. The smaller number is 1768. What is the other number?",
      "answer0": "2061",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 71,
      "difficulty_id": 2,
      "explanation": "The larger number = smaller + difference = 1768 + 293 = 2061.",
      "hints": ["The other number is larger, so add the difference.", "1768 + 293 = 2061."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 1768 + 293 = 2061."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "I am thinking of a 4-digit number between 6000 and 7000. The digit in the ones place is the smallest odd number. The digit in the tens place is 3 more than the digit in the ones place. The digit in the hundreds place is 2 less than the digit in the thousands place. What is the number I am thinking of?",
      "answer0": "6441",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 66,
      "difficulty_id": 3,
      "explanation": "Between 6000 and 7000 so thousands = 6. Ones = smallest odd number = 1. Tens = 1 + 3 = 4. Hundreds = 6 - 2 = 4. The number is 6441.",
      "hints": ["Thousands digit is 6; smallest odd number is 1.", "Tens = 1+3 = 4; hundreds = 6-2 = 4, giving 6441."],
      "source": "CHIJ 2022 P3 Weighted Assessment 1 Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Key: 6441."
    }
  ]
}