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