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