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HCF Worksheet

Vedic maths trick 36: HCF by subtraction · Set 407 · 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 121 and 220 =
  2. 2.HCF of 340 and 51 =
  3. 3.HCF of 247 and 323 =
  4. 4.HCF of 247 and 266 =
  5. 5.HCF of 20 and 18 =
  6. 6.HCF of 32 and 208 =
  7. 7.HCF of 72 and 90 =
  8. 8.HCF of 70 and 49 =
  9. 9.HCF of 220 and 120 =
  10. 10.HCF of 76 and 36 =
  11. 11.HCF of 54 and 12 =
  12. 12.HCF of 48 and 51 =
  13. 13.HCF of 176 and 256 =
  14. 14.HCF of 119 and 21 =
  15. 15.HCF of 345 and 253 =
  16. 16.HCF of 48 and 168 =
  17. 17.HCF of 220 and 300 =
  18. 18.HCF of 221 and 104 =
  19. 19.HCF of 48 and 264 =
  20. 20.HCF of 399 and 210 =
  21. 21.HCF of 209 and 198 =
  22. 22.HCF of 285 and 30 =
  23. 23.HCF of 24 and 128 =
  24. 24.HCF of 168 and 264 =
  25. 25.HCF of 60 and 280 =
  26. 26.HCF of 360 and 54 =
  27. 27.HCF of 91 and 42 =
  28. 28.HCF of 294 and 63 =
  29. 29.HCF of 114 and 12 =
  30. 30.HCF of 65 and 25 =
  31. 31.HCF of 16 and 20 =
  32. 32.HCF of 425 and 275 =
  33. 33.HCF of 336 and 147 =
  34. 34.HCF of 35 and 28 =
  35. 35.HCF of 357 and 273 =
  36. 36.HCF of 100 and 85 =
  37. 37.HCF of 220 and 242 =
  38. 38.HCF of 368 and 345 =
  39. 39.HCF of 209 and 187 =
  40. 40.HCF of 147 and 105 =

Answer key

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

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