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Cube Root Worksheet

Vedic maths trick 10: Cube roots of perfect cubes · Set 531 · 40 sums
TalentJR

The trick (Vilokanam): Last digit → unit digit of the root: 2↔8 and 3↔7 swap, every other digit stays the same. Remove the last three digits; the biggest cube not more than what is left gives the tens digit. Put them together.

NameDateTime takenScore ___ / 40
  1. 1.∛328509 =
  2. 2.∛373248 =
  3. 3.∛493039 =
  4. 4.∛8000 =
  5. 5.∛1331 =
  6. 6.∛103823 =
  7. 7.∛166375 =
  8. 8.∛287496 =
  9. 9.∛2197 =
  10. 10.∛97336 =
  11. 11.∛216000 =
  12. 12.∛64000 =
  13. 13.∛8000 =
  14. 14.∛166375 =
  15. 15.∛125000 =
  16. 16.∛24389 =
  17. 17.∛68921 =
  18. 18.∛421875 =
  19. 19.∛35937 =
  20. 20.∛50653 =
  21. 21.∛314432 =
  22. 22.∛474552 =
  23. 23.∛54872 =
  24. 24.∛42875 =
  25. 25.∛592704 =
  26. 26.∛405224 =
  27. 27.∛571787 =
  28. 28.∛185193 =
  29. 29.∛238328 =
  30. 30.∛17576 =
  31. 31.∛614125 =
  32. 32.∛778688 =
  33. 33.∛39304 =
  34. 34.∛438976 =
  35. 35.∛4913 =
  36. 36.∛373248 =
  37. 37.∛13824 =
  38. 38.∛185193 =
  39. 39.∛195112 =
  40. 40.∛9261 =

Answer key

  1. 69
  2. 72
  3. 79
  4. 20
  5. 11
  6. 47
  7. 55
  8. 66
  9. 13
  10. 46
  11. 60
  12. 40
  13. 20
  14. 55
  15. 50
  16. 29
  17. 41
  18. 75
  19. 33
  20. 37
  21. 68
  22. 78
  23. 38
  24. 35
  25. 84
  26. 74
  27. 83
  28. 57
  29. 62
  30. 26
  31. 85
  32. 92
  33. 34
  34. 76
  35. 17
  36. 72
  37. 24
  38. 57
  39. 58
  40. 21

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