← HCF and LCM lesson New set →

HCF and LCM Worksheet

Quantitative aptitude lesson 1: HCF and LCM · Set 233 · 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 LCM of 5 and 3.
  2. 2.Find the LCM of 10, 15 and 5.
  3. 3.Find the LCM of 28 and 8.
  4. 4.The HCF of two numbers is 5 and their LCM is 50. One of the numbers is 10. What is the other number?
  5. 5.The HCF of two numbers is 9 and their LCM is 108. One of the numbers is 27. What is the other number?
  6. 6.The HCF of two numbers is 8 and their LCM is 96. One of the numbers is 24. What is the other number?
  7. 7.The HCF of two numbers is 4 and their LCM is 60. One of the numbers is 12. What is the other number?
  8. 8.The HCF of two numbers is 3 and their LCM is 60. One of the numbers is 12. What is the other number?
  9. 9.Find the LCM of 16 and 12.
  10. 10.The HCF of two numbers is 7 and their LCM is 504. One of the numbers is 63. What is the other number?
  11. 11.Find the HCF of 18 and 63.
  12. 12.Find the LCM of 35 and 10.
  13. 13.Find the HCF of 70 and 56.
  14. 14.Find the LCM of 12, 4 and 6.
  15. 15.The HCF of two numbers is 9 and their LCM is 324. One of the numbers is 36. What is the other number?
  16. 16.Find the LCM of 35 and 15.
  17. 17.Find the LCM of 40 and 15.
  18. 18.The HCF of two numbers is 7 and their LCM is 252. One of the numbers is 28. What is the other number?
  19. 19.Find the LCM of 11, 5 and 2.
  20. 20.The HCF of two numbers is 9 and their LCM is 567. One of the numbers is 81. What is the other number?
  21. 21.Find the LCM of 18 and 15.
  22. 22.Find the HCF of 32 and 24.
  23. 23.The HCF of two numbers is 3 and their LCM is 18. One of the numbers is 6. What is the other number?
  24. 24.Find the HCF of 40 and 16.
  25. 25.Find the LCM of 30 and 48.
  26. 26.Find the LCM of 30 and 12.
  27. 27.The HCF of two numbers is 7 and their LCM is 504. One of the numbers is 56. What is the other number?
  28. 28.Find the LCM of 32 and 20.
  29. 29.Find the HCF of 55 and 99.
  30. 30.Find the HCF of 60 and 45.
  31. 31.Find the LCM of 16 and 18.
  32. 32.Find the HCF of 36 and 20.
  33. 33.Find the LCM of 8 and 5.
  34. 34.Find the LCM of 28 and 20.
  35. 35.Find the LCM of 25 and 20.
  36. 36.The HCF of two numbers is 5 and their LCM is 30. One of the numbers is 15. What is the other number?
  37. 37.Find the LCM of 5, 4 and 12.
  38. 38.Find the LCM of 15, 12 and 6.
  39. 39.Find the LCM of 7 and 9.
  40. 40.Find the LCM of 42 and 54.

Answer key

  1. 15
  2. 30
  3. 56
  4. 25
  5. 36
  6. 32
  7. 20
  8. 15
  9. 48
  10. 56
  11. 9
  12. 70
  13. 14
  14. 12
  15. 81
  16. 105
  17. 120
  18. 63
  19. 110
  20. 63
  21. 90
  22. 8
  23. 9
  24. 8
  25. 240
  26. 60
  27. 63
  28. 160
  29. 11
  30. 15
  31. 144
  32. 4
  33. 40
  34. 140
  35. 100
  36. 10
  37. 60
  38. 60
  39. 63
  40. 378

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