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HCF Worksheet

Vedic maths trick 36: HCF by subtraction · Set 881 · 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 91 and 14 =
  2. 2.HCF of 90 and 153 =
  3. 3.HCF of 300 and 195 =
  4. 4.HCF of 60 and 84 =
  5. 5.HCF of 456 and 432 =
  6. 6.HCF of 126 and 234 =
  7. 7.HCF of 198 and 360 =
  8. 8.HCF of 20 and 90 =
  9. 9.HCF of 209 and 88 =
  10. 10.HCF of 90 and 117 =
  11. 11.HCF of 192 and 168 =
  12. 12.HCF of 12 and 44 =
  13. 13.HCF of 133 and 95 =
  14. 14.HCF of 32 and 22 =
  15. 15.HCF of 40 and 88 =
  16. 16.HCF of 54 and 39 =
  17. 17.HCF of 96 and 112 =
  18. 18.HCF of 90 and 42 =
  19. 19.HCF of 208 and 240 =
  20. 20.HCF of 228 and 204 =
  21. 21.HCF of 162 and 99 =
  22. 22.HCF of 289 and 170 =
  23. 23.HCF of 63 and 35 =
  24. 24.HCF of 35 and 63 =
  25. 25.HCF of 18 and 21 =
  26. 26.HCF of 63 and 84 =
  27. 27.HCF of 6 and 9 =
  28. 28.HCF of 272 and 221 =
  29. 29.HCF of 253 and 69 =
  30. 30.HCF of 10 and 18 =
  31. 31.HCF of 120 and 88 =
  32. 32.HCF of 24 and 64 =
  33. 33.HCF of 63 and 56 =
  34. 34.HCF of 238 and 252 =
  35. 35.HCF of 221 and 136 =
  36. 36.HCF of 112 and 128 =
  37. 37.HCF of 125 and 200 =
  38. 38.HCF of 63 and 180 =
  39. 39.HCF of 30 and 102 =
  40. 40.HCF of 28 and 12 =

Answer key

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

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