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Factors, multiples and primes worksheet

Intermediate · 24 problems with a full answer key. Free to print, free to copy, and nothing to sign up for.

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Factors, multiples and primes practice

Least common multiple, small · intermediate
Name Date

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  1. 1. What is the least common multiple of 8 and 20?
  2. 2. What is the least common multiple of 20 and 18?
  3. 3. What is the least common multiple of 14 and 10?
  4. 4. What is the least common multiple of 12 and 14?
  5. 5. What is the least common multiple of 8 and 6?
  6. 6. What is the least common multiple of 4 and 14?
  7. 7. What is the least common multiple of 18 and 8?
  8. 8. What is the least common multiple of 20 and 16?
  9. 9. What is the least common multiple of 6 and 15?
  10. 10. What is the least common multiple of 6 and 20?
  11. 11. What is the least common multiple of 16 and 10?
  12. 12. What is the least common multiple of 10 and 4?
  13. 13. What is the least common multiple of 10 and 8?
  14. 14. What is the least common multiple of 10 and 18?
  15. 15. What is the least common multiple of 16 and 6?
  16. 16. What is the least common multiple of 14 and 16?
  17. 17. What is the least common multiple of 10 and 16?
  18. 18. What is the least common multiple of 12 and 15?
  19. 19. What is the least common multiple of 14 and 4?
  20. 20. What is the least common multiple of 10 and 12?
  21. 21. What is the least common multiple of 15 and 9?
  22. 22. What is the least common multiple of 4 and 10?
  23. 23. What is the least common multiple of 16 and 12?
  24. 24. What is the least common multiple of 15 and 18?
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Factors, multiples and primes practice

Least common multiple, small · intermediate
Name Date
Answer key
  1. 1. What is the least common multiple of 8 and 20? 40
  2. 2. What is the least common multiple of 20 and 18? 180
  3. 3. What is the least common multiple of 14 and 10? 70
  4. 4. What is the least common multiple of 12 and 14? 84
  5. 5. What is the least common multiple of 8 and 6? 24
  6. 6. What is the least common multiple of 4 and 14? 28
  7. 7. What is the least common multiple of 18 and 8? 72
  8. 8. What is the least common multiple of 20 and 16? 80
  9. 9. What is the least common multiple of 6 and 15? 30
  10. 10. What is the least common multiple of 6 and 20? 60
  11. 11. What is the least common multiple of 16 and 10? 80
  12. 12. What is the least common multiple of 10 and 4? 20
  13. 13. What is the least common multiple of 10 and 8? 40
  14. 14. What is the least common multiple of 10 and 18? 90
  15. 15. What is the least common multiple of 16 and 6? 48
  16. 16. What is the least common multiple of 14 and 16? 112
  17. 17. What is the least common multiple of 10 and 16? 80
  18. 18. What is the least common multiple of 12 and 15? 60
  19. 19. What is the least common multiple of 14 and 4? 28
  20. 20. What is the least common multiple of 10 and 12? 60
  21. 21. What is the least common multiple of 15 and 9? 45
  22. 22. What is the least common multiple of 4 and 10? 20
  23. 23. What is the least common multiple of 16 and 12? 48
  24. 24. What is the least common multiple of 15 and 18? 90
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Standards this covers

  • 4.OA.B.4
  • 6.NS.B.4

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