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