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