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