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