WaffleMath LogoWaffleMath
K12345678HSBrowse standardsBrowse worksheetsTeacher resources

Prime & Composite Worksheet

Recommended for 4th Grade — 6th Grade

More Prime & Composite GamesAll Worksheets
New Worksheet

Prime & Composite Worksheet

Name: ____________________Date: ____________

Instructions: Identifying prime and composite numbers and writing prime factorizations.

20 problems

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