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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 821 · 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 97 × 86 =
  2. 2.Digital root of 92 × 97 =
  3. 3.Digital root of 55 × 88 =
  4. 4.Digital root of 12 × 76 =
  5. 5.Digital root of 15 × 61 =
  6. 6.Digital root of 834 =
  7. 7.Digital root of 84009 =
  8. 8.Digital root of 35487 =
  9. 9.Digital root of 77250 =
  10. 10.Digital root of 94 × 39 =
  11. 11.Digital root of 40095 =
  12. 12.Digital root of 82869 =
  13. 13.Digital root of 94 × 41 =
  14. 14.Digital root of 31 × 24 =
  15. 15.Digital root of 66 × 78 =
  16. 16.Digital root of 71687 =
  17. 17.Digital root of 46140 =
  18. 18.Digital root of 10918 =
  19. 19.Digital root of 86587 =
  20. 20.Digital root of 79 × 12 =
  21. 21.Digital root of 40430 =
  22. 22.Digital root of 93 × 71 =
  23. 23.Digital root of 87 × 67 =
  24. 24.Digital root of 62 × 89 =
  25. 25.Digital root of 18 × 16 =
  26. 26.Digital root of 13436 =
  27. 27.Digital root of 81682 =
  28. 28.Digital root of 17212 =
  29. 29.Digital root of 27 × 59 =
  30. 30.Digital root of 95933 =
  31. 31.Digital root of 29305 =
  32. 32.Digital root of 92 × 31 =
  33. 33.Digital root of 63465 =
  34. 34.Digital root of 52 × 95 =
  35. 35.Digital root of 98 × 87 =
  36. 36.Digital root of 79 × 33 =
  37. 37.Digital root of 58050 =
  38. 38.Digital root of 66 × 96 =
  39. 39.Digital root of 88469 =
  40. 40.Digital root of 31856 =

Answer key

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

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