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HCF Worksheet

Vedic maths trick 36: HCF by subtraction · Set 859 · 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 35 and 98 =
  2. 2.HCF of 221 and 91 =
  3. 3.HCF of 242 and 418 =
  4. 4.HCF of 342 and 216 =
  5. 5.HCF of 98 and 91 =
  6. 6.HCF of 91 and 140 =
  7. 7.HCF of 91 and 130 =
  8. 8.HCF of 65 and 91 =
  9. 9.HCF of 357 and 294 =
  10. 10.HCF of 42 and 24 =
  11. 11.HCF of 28 and 12 =
  12. 12.HCF of 27 and 99 =
  13. 13.HCF of 440 and 374 =
  14. 14.HCF of 45 and 10 =
  15. 15.HCF of 147 and 126 =
  16. 16.HCF of 150 and 475 =
  17. 17.HCF of 91 and 260 =
  18. 18.HCF of 250 and 325 =
  19. 19.HCF of 260 and 180 =
  20. 20.HCF of 30 and 165 =
  21. 21.HCF of 175 and 225 =
  22. 22.HCF of 35 and 49 =
  23. 23.HCF of 323 and 187 =
  24. 24.HCF of 32 and 10 =
  25. 25.HCF of 306 and 221 =
  26. 26.HCF of 20 and 70 =
  27. 27.HCF of 228 and 192 =
  28. 28.HCF of 49 and 14 =
  29. 29.HCF of 63 and 91 =
  30. 30.HCF of 143 and 88 =
  31. 31.HCF of 180 and 255 =
  32. 32.HCF of 437 and 115 =
  33. 33.HCF of 270 and 126 =
  34. 34.HCF of 72 and 204 =
  35. 35.HCF of 117 and 171 =
  36. 36.HCF of 100 and 70 =
  37. 37.HCF of 16 and 24 =
  38. 38.HCF of 126 and 90 =
  39. 39.HCF of 105 and 14 =
  40. 40.HCF of 91 and 70 =

Answer key

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

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