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