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