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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 486 · 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 18 × 81 =
  2. 2.Digital root of 13722 =
  3. 3.Digital root of 31582 =
  4. 4.Digital root of 46 × 64 =
  5. 5.Digital root of 60 × 71 =
  6. 6.Digital root of 30859 =
  7. 7.Digital root of 91 × 89 =
  8. 8.Digital root of 85 × 99 =
  9. 9.Digital root of 50405 =
  10. 10.Digital root of 83 × 29 =
  11. 11.Digital root of 30213 =
  12. 12.Digital root of 60 × 84 =
  13. 13.Digital root of 32732 =
  14. 14.Digital root of 80755 =
  15. 15.Digital root of 18 × 28 =
  16. 16.Digital root of 36602 =
  17. 17.Digital root of 69 × 95 =
  18. 18.Digital root of 28 × 12 =
  19. 19.Digital root of 24618 =
  20. 20.Digital root of 57682 =
  21. 21.Digital root of 10371 =
  22. 22.Digital root of 26 × 67 =
  23. 23.Digital root of 99968 =
  24. 24.Digital root of 90 × 75 =
  25. 25.Digital root of 70 × 52 =
  26. 26.Digital root of 35 × 27 =
  27. 27.Digital root of 54 × 85 =
  28. 28.Digital root of 49 × 54 =
  29. 29.Digital root of 99 × 37 =
  30. 30.Digital root of 37374 =
  31. 31.Digital root of 24 × 70 =
  32. 32.Digital root of 53256 =
  33. 33.Digital root of 61 × 26 =
  34. 34.Digital root of 35 × 22 =
  35. 35.Digital root of 35393 =
  36. 36.Digital root of 55 × 86 =
  37. 37.Digital root of 68718 =
  38. 38.Digital root of 62 × 45 =
  39. 39.Digital root of 92 × 67 =
  40. 40.Digital root of 77123 =

Answer key

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

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