Primary 4 Mathematics Whole Numbers Quiz

Primary 4 Mathematics Quiz - Whole Numbers (Answer Key)

Total Marks: 40
Topic: Whole Numbers (numbers up to 100,000)

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Section A Answers (Q1–10, 2 marks each)

Q1. Digit in thousands place of 84,217

• Place values: 8 (ten thousands), 4 (thousands), 2 (hundreds), 1 (tens), 7 (ones).
• Answer: 4
• Teaching note: The thousands place is the 4th digit from the right. Common mistake: confusing thousands with ten thousands.

Q2. Digit 6 in 56,309 stands for

• 6 is in the thousands place → 6 × 1,000 = 6,000.
• Answer: 6,000
• Teaching note: "Stand for" means its place value, not the digit itself.

Q3. Seventy-two thousand and forty-eight in figures

• 72,000 + 48 = 72,048.
• Answer: 72,048
• Teaching note: "Forty-eight" = 48, not 408.

Q4. 29,056 to nearest hundred

• Hundreds digit is 0, next digit 5 → round up. 29,056 ≈ 29,100.
• Answer: 29,100
• Teaching note: If next digit ≥5, round up.

Q5. 73,450 to nearest thousand

• Thousands digit 3, next digit 4 (<5) → keep. 73,450 ≈ 73,000.
• Answer: 73,000
• Teaching note: Boundary 450 rounds down to 73,000.

Q6. Rounded to nearest ten = 4,380; original?

• Range: 4,375 to 4,384. Only 4,384 fits.
• Answer: (C) 4,384
• Teaching note: 4,385 rounds to 4,390.

Q7. 3,214 × 4

• 3,000×4=12,000; 200×4=800; 10×4=40; 4×4=16 → 12,856.
• Answer: 12,856

Q8. 8,472 ÷ 6

• 8,472 ÷ 6 = 1,412 remainder 0.
• Answer: 1,412 sweets, 0 left over
• Working: 6×1,412 = 8,472.

Q9. Factors of 18

• Pairs: 1×18, 2×9, 3×6.
• Answer: 1, 2, 3, 6, 9, 18
• Teaching note: Include 1 and 18.

Q10. Multiple of 7

• 7×8=56.
• Answer: (B) 56
• Teaching note: 70 also multiple but not in options as correct single; (B) is listed.

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Section B Answers (Q11–16, 2 marks each)

Q11. 12,438 + 9,567

• 12,438 + 9,000 = 21,438; +567 = 22,005.
• Answer: 22,005

Q12. 40,000 – 15,279

• 40,000 – 15,000 = 25,000; –279 = 24,721.
• Answer: 24,721

Q13. 61,795 to nearest ten thousand

• Ten thousands digit 6, next 1 (<5) → 60,000.
• Answer: 60,000

Q14. Common factors of 12 and 18

• Factors of 12: 1,2,3,4,6,12. Factors of 18: 1,2,3,6,9,18. Common: 1,2,3,6.
• Answer: 1, 2, 3, 6

Q15. Greatest number rounding to 5,200 (nearest hundred)

• Max before 5,250: 5,249.
• Answer: 5,249

Q16. 2,305 × 3

• 2,000×3=6,000; 300×3=900; 5×3=15 → 6,915.
• Answer: 6,915

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Section C Answers (Q17–20, 3 marks each)

Q17. Markers left

• Bought: 3 × 1,248 = 3,744.
• Left: 3,744 – 1,500 = 2,244.
• Answer: 2,244 markers
• Marks: 1 for multiplication, 1 for subtraction, 1 for correct answer.

Q18. Books per shelf

• 4,680 ÷ 8 = 585.
• Answer: 585 books
• Marks: 2 for method, 1 for answer.

Q19. More on Sunday

• 3,178 – 2,345 = 833.
• Answer: 833 tickets
• Marks: 2 for subtraction, 1 for answer.

Q20. Least stickers for groups of 4,6,8

• Multiples of 4: 4,8,12,16,20,24…
• Multiples of 6: 6,12,18,24…
• Multiples of 8: 8,16,24…
• LCM = 24.
• Answer: 24 stickers
• Marks: 1 for listing, 1 for identifying common, 1 for LCM.