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