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HCF Worksheet

Vedic maths trick 36: HCF by subtraction · Set 780 · 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 28 and 91 =
  2. 2.HCF of 408 and 144 =
  3. 3.HCF of 95 and 38 =
  4. 4.HCF of 42 and 39 =
  5. 5.HCF of 437 and 322 =
  6. 6.HCF of 120 and 78 =
  7. 7.HCF of 325 and 200 =
  8. 8.HCF of 34 and 38 =
  9. 9.HCF of 78 and 30 =
  10. 10.HCF of 85 and 80 =
  11. 11.HCF of 112 and 70 =
  12. 12.HCF of 54 and 252 =
  13. 13.HCF of 28 and 18 =
  14. 14.HCF of 144 and 306 =
  15. 15.HCF of 170 and 80 =
  16. 16.HCF of 90 and 342 =
  17. 17.HCF of 216 and 120 =
  18. 18.HCF of 418 and 110 =
  19. 19.HCF of 247 and 143 =
  20. 20.HCF of 90 and 110 =
  21. 21.HCF of 88 and 121 =
  22. 22.HCF of 96 and 84 =
  23. 23.HCF of 180 and 168 =
  24. 24.HCF of 91 and 70 =
  25. 25.HCF of 28 and 30 =
  26. 26.HCF of 36 and 135 =
  27. 27.HCF of 102 and 78 =
  28. 28.HCF of 225 and 105 =
  29. 29.HCF of 36 and 24 =
  30. 30.HCF of 210 and 98 =
  31. 31.HCF of 88 and 66 =
  32. 32.HCF of 40 and 52 =
  33. 33.HCF of 98 and 77 =
  34. 34.HCF of 221 and 119 =
  35. 35.HCF of 76 and 323 =
  36. 36.HCF of 418 and 374 =
  37. 37.HCF of 48 and 33 =
  38. 38.HCF of 192 and 456 =
  39. 39.HCF of 130 and 80 =
  40. 40.HCF of 65 and 91 =

Answer key

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

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