← HCF and LCM lesson New set →

HCF and LCM Worksheet

Quantitative aptitude lesson 1: HCF and LCM · Set 867 · 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.The HCF of two numbers is 9 and their LCM is 270. One of the numbers is 54. What is the other number?
  2. 2.Find the LCM of 12, 3 and 9.
  3. 3.Find the LCM of 3, 10 and 12.
  4. 4.The HCF of two numbers is 7 and their LCM is 210. One of the numbers is 35. What is the other number?
  5. 5.Find the LCM of 9 and 8.
  6. 6.Find the LCM of 15 and 21.
  7. 7.Find the HCF of 30 and 40.
  8. 8.Find the HCF of 8 and 6.
  9. 9.Find the LCM of 13, 3 and 12.
  10. 10.Find the HCF of 88 and 99.
  11. 11.Find the LCM of 20 and 16.
  12. 12.Find the LCM of 5 and 7.
  13. 13.Find the LCM of 4, 7 and 14.
  14. 14.Find the LCM of 13, 4 and 3.
  15. 15.Find the HCF of 18 and 10.
  16. 16.The HCF of two numbers is 2 and their LCM is 12. One of the numbers is 4. What is the other number?
  17. 17.The HCF of two numbers is 6 and their LCM is 210. One of the numbers is 30. What is the other number?
  18. 18.Find the LCM of 15, 10 and 8.
  19. 19.Find the LCM of 12 and 42.
  20. 20.Find the HCF of 21 and 56.
  21. 21.Find the LCM of 9 and 4.
  22. 22.The HCF of two numbers is 2 and their LCM is 30. One of the numbers is 10. What is the other number?
  23. 23.The HCF of two numbers is 8 and their LCM is 120. One of the numbers is 40. What is the other number?
  24. 24.The HCF of two numbers is 2 and their LCM is 60. One of the numbers is 12. What is the other number?
  25. 25.Find the HCF of 40 and 56.
  26. 26.Find the LCM of 12 and 8.
  27. 27.Find the HCF of 28 and 16.
  28. 28.Find the LCM of 3, 15 and 6.
  29. 29.Find the LCM of 3, 4 and 14.
  30. 30.The HCF of two numbers is 8 and their LCM is 224. One of the numbers is 32. What is the other number?
  31. 31.The HCF of two numbers is 4 and their LCM is 80. One of the numbers is 20. What is the other number?
  32. 32.Find the LCM of 9 and 5.
  33. 33.Find the LCM of 6, 2 and 13.
  34. 34.The HCF of two numbers is 7 and their LCM is 70. One of the numbers is 35. What is the other number?
  35. 35.Find the LCM of 28 and 32.
  36. 36.Find the LCM of 28 and 20.
  37. 37.Find the LCM of 6 and 15.
  38. 38.Find the LCM of 10 and 12.
  39. 39.Find the LCM of 12, 8 and 6.
  40. 40.Find the HCF of 91 and 39.

Answer key

  1. 45
  2. 36
  3. 60
  4. 42
  5. 72
  6. 105
  7. 10
  8. 2
  9. 156
  10. 11
  11. 80
  12. 35
  13. 28
  14. 156
  15. 2
  16. 6
  17. 42
  18. 120
  19. 84
  20. 7
  21. 36
  22. 6
  23. 24
  24. 10
  25. 8
  26. 24
  27. 4
  28. 30
  29. 84
  30. 56
  31. 16
  32. 45
  33. 78
  34. 14
  35. 224
  36. 140
  37. 30
  38. 60
  39. 24
  40. 13

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