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