← HCF and LCM lesson New set →

HCF and LCM Worksheet

Quantitative aptitude lesson 1: HCF and LCM · Set 488 · 40 questions
TalentJR

The method (Prime factors): Write each number as a product of primes: 36 = 2 × 2 × 3 × 3. HCF: multiply the primes the numbers share (each as many times as it appears in both). LCM: take every prime the greatest number of times it appears. For two numbers, HCF × LCM = first number × second number.

NameDateTime takenScore ___ / 40
  1. 1.Find the HCF of 70 and 80.
  2. 2.Find the LCM of 12, 8 and 7.
  3. 3.The HCF of two numbers is 2 and their LCM is 126. One of the numbers is 14. What is the other number?
  4. 4.Find the HCF of 6 and 15.
  5. 5.Find the HCF of 84 and 48.
  6. 6.Find the LCM of 6, 8 and 4.
  7. 7.Find the HCF of 72 and 84.
  8. 8.Find the LCM of 10, 15 and 7.
  9. 9.Find the HCF of 60 and 48.
  10. 10.Find the LCM of 32 and 28.
  11. 11.Find the LCM of 2 and 9.
  12. 12.Find the LCM of 8, 15 and 2.
  13. 13.Find the LCM of 6 and 14.
  14. 14.Find the LCM of 3, 12 and 7.
  15. 15.Find the HCF of 77 and 99.
  16. 16.Find the HCF of 8 and 18.
  17. 17.Find the HCF of 70 and 20.
  18. 18.Find the LCM of 10, 4 and 3.
  19. 19.Find the HCF of 18 and 27.
  20. 20.Find the LCM of 5, 8 and 12.
  21. 21.Find the LCM of 9, 3 and 7.
  22. 22.Find the HCF of 96 and 108.
  23. 23.Find the LCM of 42 and 30.
  24. 24.Find the HCF of 63 and 14.
  25. 25.Find the LCM of 28 and 12.
  26. 26.Find the HCF of 35 and 42.
  27. 27.Find the LCM of 8, 12 and 6.
  28. 28.Find the LCM of 6, 2 and 14.
  29. 29.Find the LCM of 5, 13 and 10.
  30. 30.Find the HCF of 40 and 48.
  31. 31.Find the LCM of 12 and 15.
  32. 32.The HCF of two numbers is 3 and their LCM is 54. One of the numbers is 27. What is the other number?
  33. 33.Find the LCM of 3, 11 and 12.
  34. 34.The HCF of two numbers is 2 and their LCM is 144. One of the numbers is 18. What is the other number?
  35. 35.Find the LCM of 7, 8 and 2.
  36. 36.Find the HCF of 10 and 14.
  37. 37.Find the HCF of 48 and 42.
  38. 38.Find the LCM of 16 and 36.
  39. 39.Find the LCM of 3, 9 and 8.
  40. 40.Find the LCM of 8, 15 and 10.

Answer key

  1. 10
  2. 168
  3. 18
  4. 3
  5. 12
  6. 24
  7. 12
  8. 210
  9. 12
  10. 224
  11. 18
  12. 120
  13. 42
  14. 84
  15. 11
  16. 2
  17. 10
  18. 60
  19. 9
  20. 120
  21. 63
  22. 12
  23. 210
  24. 7
  25. 84
  26. 7
  27. 24
  28. 42
  29. 130
  30. 8
  31. 60
  32. 6
  33. 132
  34. 16
  35. 56
  36. 2
  37. 6
  38. 144
  39. 72
  40. 120

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude