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