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Prime & Composite Worksheet

Recommended for 4th Grade — 6th Grade

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Prime & Composite Worksheet

Name: ____________________Date: ____________

Instructions: Identifying prime and composite numbers and writing prime factorizations.

20 problems

  1. Prime numbers in {9, 21, 17, 29, 25, 15} → ______
  2. Prime numbers in {27, 7, 17, 5, 12, 2} → ______
  3. Prime numbers in {29, 8, 15, 11, 9, 27} → ______
  4. Prime numbers in {13, 11, 7, 15, 9, 5} → ______
  5. Prime numbers in {11, 13, 23, 25, 8, 7} → ______
  6. Prime numbers in {17, 2, 13, 7, 29, 15} → ______
  7. Prime numbers in {29, 9, 15, 25, 3, 5} → ______
  8. Prime numbers in {17, 13, 12, 15, 2, 23} → ______
  9. Prime numbers in {17, 27, 8, 11, 13, 5} → ______
  10. Prime numbers in {23, 21, 29, 15, 3, 2} → ______
  11. Prime numbers in {12, 25, 2, 7, 17, 19} → ______
  12. Prime numbers in {27, 23, 25, 11, 19, 13} → ______
  13. Prime numbers in {17, 25, 3, 2, 15, 5} → ______
  14. Prime numbers in {11, 25, 19, 17, 9, 12} → ______
  15. Prime numbers in {11, 3, 13, 29, 2, 19} → ______
  16. Prime numbers in {13, 29, 8, 9, 27, 19} → ______
  17. Prime numbers in {29, 25, 23, 12, 5, 11} → ______
  18. Prime numbers in {3, 29, 27, 19, 8, 12} → ______
  19. Prime numbers in {27, 19, 11, 21, 17, 13} → ______
  20. Prime numbers in {23, 21, 19, 13, 17, 12} → ______