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HCF Worksheet

Vedic maths trick 36: HCF by subtraction · Set 210 · 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 242 and 264 =
  2. 2.HCF of 306 and 198 =
  3. 3.HCF of 40 and 144 =
  4. 4.HCF of 60 and 48 =
  5. 5.HCF of 4 and 10 =
  6. 6.HCF of 92 and 253 =
  7. 7.HCF of 38 and 95 =
  8. 8.HCF of 32 and 28 =
  9. 9.HCF of 425 and 75 =
  10. 10.HCF of 100 and 280 =
  11. 11.HCF of 112 and 21 =
  12. 12.HCF of 49 and 77 =
  13. 13.HCF of 66 and 18 =
  14. 14.HCF of 147 and 231 =
  15. 15.HCF of 380 and 120 =
  16. 16.HCF of 247 and 104 =
  17. 17.HCF of 289 and 255 =
  18. 18.HCF of 42 and 28 =
  19. 19.HCF of 130 and 169 =
  20. 20.HCF of 80 and 170 =
  21. 21.HCF of 400 and 425 =
  22. 22.HCF of 84 and 35 =
  23. 23.HCF of 286 and 66 =
  24. 24.HCF of 32 and 38 =
  25. 25.HCF of 374 and 154 =
  26. 26.HCF of 95 and 76 =
  27. 27.HCF of 160 and 56 =
  28. 28.HCF of 112 and 144 =
  29. 29.HCF of 64 and 208 =
  30. 30.HCF of 76 and 44 =
  31. 31.HCF of 30 and 24 =
  32. 32.HCF of 78 and 30 =
  33. 33.HCF of 28 and 68 =
  34. 34.HCF of 221 and 91 =
  35. 35.HCF of 240 and 224 =
  36. 36.HCF of 76 and 48 =
  37. 37.HCF of 72 and 42 =
  38. 38.HCF of 30 and 225 =
  39. 39.HCF of 63 and 294 =
  40. 40.HCF of 115 and 161 =

Answer key

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

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