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