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HCF Worksheet

Vedic maths trick 36: HCF by subtraction · Set 350 · 40 sums
TalentJR

The trick (Sankalana-Vyavakalanabhyam): Take the smaller number away from the bigger one, as many times as it goes. Now use the smaller number and what is left. Repeat until nothing is left: the last number before 0 is the HCF.

NameDateTime takenScore ___ / 40
  1. 1.HCF of 42 and 24 =
  2. 2.HCF of 289 and 340 =
  3. 3.HCF of 187 and 51 =
  4. 4.HCF of 80 and 64 =
  5. 5.HCF of 160 and 24 =
  6. 6.HCF of 119 and 34 =
  7. 7.HCF of 16 and 44 =
  8. 8.HCF of 90 and 70 =
  9. 9.HCF of 119 and 306 =
  10. 10.HCF of 204 and 85 =
  11. 11.HCF of 96 and 264 =
  12. 12.HCF of 80 and 288 =
  13. 13.HCF of 38 and 40 =
  14. 14.HCF of 75 and 80 =
  15. 15.HCF of 24 and 54 =
  16. 16.HCF of 91 and 14 =
  17. 17.HCF of 90 and 80 =
  18. 18.HCF of 342 and 90 =
  19. 19.HCF of 247 and 95 =
  20. 20.HCF of 105 and 189 =
  21. 21.HCF of 104 and 65 =
  22. 22.HCF of 69 and 391 =
  23. 23.HCF of 24 and 16 =
  24. 24.HCF of 120 and 16 =
  25. 25.HCF of 90 and 342 =
  26. 26.HCF of 84 and 35 =
  27. 27.HCF of 9 and 21 =
  28. 28.HCF of 80 and 72 =
  29. 29.HCF of 240 and 195 =
  30. 30.HCF of 121 and 143 =
  31. 31.HCF of 144 and 204 =
  32. 32.HCF of 4 and 22 =
  33. 33.HCF of 85 and 95 =
  34. 34.HCF of 60 and 228 =
  35. 35.HCF of 323 and 57 =
  36. 36.HCF of 102 and 12 =
  37. 37.HCF of 272 and 112 =
  38. 38.HCF of 36 and 270 =
  39. 39.HCF of 90 and 70 =
  40. 40.HCF of 437 and 115 =

Answer key

  1. 6
  2. 17
  3. 17
  4. 16
  5. 8
  6. 17
  7. 4
  8. 10
  9. 17
  10. 17
  11. 24
  12. 16
  13. 2
  14. 5
  15. 6
  16. 7
  17. 10
  18. 18
  19. 19
  20. 21
  21. 13
  22. 23
  23. 8
  24. 8
  25. 18
  26. 7
  27. 3
  28. 8
  29. 15
  30. 11
  31. 12
  32. 2
  33. 5
  34. 12
  35. 19
  36. 6
  37. 16
  38. 18
  39. 10
  40. 23

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