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