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HCF Worksheet

Vedic maths trick 36: HCF by subtraction · Set 440 · 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 38 and 95 =
  2. 2.HCF of 368 and 207 =
  3. 3.HCF of 336 and 189 =
  4. 4.HCF of 60 and 65 =
  5. 5.HCF of 60 and 140 =
  6. 6.HCF of 66 and 96 =
  7. 7.HCF of 28 and 16 =
  8. 8.HCF of 77 and 63 =
  9. 9.HCF of 238 and 51 =
  10. 10.HCF of 147 and 210 =
  11. 11.HCF of 85 and 51 =
  12. 12.HCF of 28 and 21 =
  13. 13.HCF of 152 and 144 =
  14. 14.HCF of 84 and 182 =
  15. 15.HCF of 52 and 39 =
  16. 16.HCF of 100 and 70 =
  17. 17.HCF of 99 and 117 =
  18. 18.HCF of 38 and 57 =
  19. 19.HCF of 208 and 320 =
  20. 20.HCF of 15 and 54 =
  21. 21.HCF of 170 and 153 =
  22. 22.HCF of 135 and 153 =
  23. 23.HCF of 234 and 198 =
  24. 24.HCF of 196 and 154 =
  25. 25.HCF of 225 and 200 =
  26. 26.HCF of 112 and 176 =
  27. 27.HCF of 80 and 180 =
  28. 28.HCF of 323 and 114 =
  29. 29.HCF of 357 and 315 =
  30. 30.HCF of 396 and 110 =
  31. 31.HCF of 152 and 285 =
  32. 32.HCF of 24 and 51 =
  33. 33.HCF of 418 and 440 =
  34. 34.HCF of 66 and 242 =
  35. 35.HCF of 20 and 15 =
  36. 36.HCF of 242 and 198 =
  37. 37.HCF of 224 and 42 =
  38. 38.HCF of 132 and 48 =
  39. 39.HCF of 168 and 266 =
  40. 40.HCF of 42 and 70 =

Answer key

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

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