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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 260 · 40 sums
TalentJR

The trick (Gunita Samuccayah): Add the digits of a number; keep adding until one digit is left (a total of 9 stays 9). For a product, multiply the digital roots of the two numbers and take the digital root of that. If your answer’s digital root is different, the answer is wrong.

NameDateTime takenScore ___ / 40
  1. 1.Digital root of 39 × 42 =
  2. 2.Digital root of 83 × 16 =
  3. 3.Digital root of 93 × 80 =
  4. 4.Digital root of 24 × 86 =
  5. 5.Digital root of 38 × 91 =
  6. 6.Digital root of 16078 =
  7. 7.Digital root of 16904 =
  8. 8.Digital root of 92216 =
  9. 9.Digital root of 14892 =
  10. 10.Digital root of 37713 =
  11. 11.Digital root of 90346 =
  12. 12.Digital root of 91 × 15 =
  13. 13.Digital root of 60 × 20 =
  14. 14.Digital root of 7172 =
  15. 15.Digital root of 19376 =
  16. 16.Digital root of 55074 =
  17. 17.Digital root of 68549 =
  18. 18.Digital root of 35162 =
  19. 19.Digital root of 54382 =
  20. 20.Digital root of 40229 =
  21. 21.Digital root of 31593 =
  22. 22.Digital root of 12976 =
  23. 23.Digital root of 83904 =
  24. 24.Digital root of 42 × 67 =
  25. 25.Digital root of 88238 =
  26. 26.Digital root of 15 × 22 =
  27. 27.Digital root of 84 × 48 =
  28. 28.Digital root of 14 × 21 =
  29. 29.Digital root of 74 × 69 =
  30. 30.Digital root of 41381 =
  31. 31.Digital root of 8889 =
  32. 32.Digital root of 22413 =
  33. 33.Digital root of 60 × 30 =
  34. 34.Digital root of 90 × 25 =
  35. 35.Digital root of 54234 =
  36. 36.Digital root of 36151 =
  37. 37.Digital root of 28 × 23 =
  38. 38.Digital root of 15 × 64 =
  39. 39.Digital root of 73 × 27 =
  40. 40.Digital root of 16635 =

Answer key

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

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