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Class 5Ages 9–10

Class 5 Factors, Multiples and Prime Numbers Worksheet

Eight questions ask for all factors of a number, six ask whether a number is prime and six ask for the first three multiples. Numbers are kept under 60, so every answer can be found by testing tables.

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Maths Guru · Class 5 Factors, Multiples and Prime Numbers Worksheet

Name: ____________________ Date: ____________ Score: ____ / 20

Answer each question. For factors, list them from smallest to largest.

  1. List all factors of 14: ___
  2. List all factors of 27: ___
  3. List all factors of 36: ___
  4. List all factors of 6: ___
  5. List all factors of 26: ___
  6. List all factors of 28: ___
  7. List all factors of 16: ___
  8. List all factors of 21: ___
  9. Is 23 a prime number? (Yes / No)
  10. Is 45 a prime number? (Yes / No)
  11. Is 11 a prime number? (Yes / No)
  12. Is 35 a prime number? (Yes / No)
  13. Is 13 a prime number? (Yes / No)
  14. Is 39 a prime number? (Yes / No)
  15. First 3 multiples of 8: ___
  16. First 3 multiples of 11: ___
  17. First 3 multiples of 15: ___
  18. First 3 multiples of 16: ___
  19. First 3 multiples of 12: ___
  20. First 3 multiples of 4: ___

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Answer key: Class 5 Factors, Multiples and Prime Numbers Worksheet

  1. 1, 2, 7, 14
  2. 1, 3, 9, 27
  3. 1, 2, 3, 4, 6, 9, 12, 18, 36
  4. 1, 2, 3, 6
  5. 1, 2, 13, 26
  6. 1, 2, 4, 7, 14, 28
  7. 1, 2, 4, 8, 16
  8. 1, 3, 7, 21
  9. Yes
  10. No
  11. Yes
  12. No
  13. Yes
  14. No
  15. 8, 16, 24
  16. 11, 22, 33
  17. 15, 30, 45
  18. 16, 32, 48
  19. 12, 24, 36
  20. 4, 8, 12

Tip for parents

Factors come in pairs: find 2 × 12 = 24 and you have found both 2 and 12 at once.

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