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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 909 · 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 17900 =
  2. 2.Digital root of 38888 =
  3. 3.Digital root of 68164 =
  4. 4.Digital root of 46686 =
  5. 5.Digital root of 42 × 46 =
  6. 6.Digital root of 26 × 42 =
  7. 7.Digital root of 18500 =
  8. 8.Digital root of 46 × 54 =
  9. 9.Digital root of 28 × 22 =
  10. 10.Digital root of 19166 =
  11. 11.Digital root of 35744 =
  12. 12.Digital root of 85702 =
  13. 13.Digital root of 76969 =
  14. 14.Digital root of 22275 =
  15. 15.Digital root of 16575 =
  16. 16.Digital root of 38 × 84 =
  17. 17.Digital root of 52 × 81 =
  18. 18.Digital root of 87 × 75 =
  19. 19.Digital root of 18110 =
  20. 20.Digital root of 27 × 91 =
  21. 21.Digital root of 88 × 34 =
  22. 22.Digital root of 41421 =
  23. 23.Digital root of 31 × 41 =
  24. 24.Digital root of 54 × 37 =
  25. 25.Digital root of 86 × 50 =
  26. 26.Digital root of 55 × 32 =
  27. 27.Digital root of 82 × 19 =
  28. 28.Digital root of 22112 =
  29. 29.Digital root of 84923 =
  30. 30.Digital root of 71 × 21 =
  31. 31.Digital root of 66 × 25 =
  32. 32.Digital root of 55818 =
  33. 33.Digital root of 67 × 97 =
  34. 34.Digital root of 73 × 57 =
  35. 35.Digital root of 29 × 80 =
  36. 36.Digital root of 74354 =
  37. 37.Digital root of 26 × 47 =
  38. 38.Digital root of 21 × 23 =
  39. 39.Digital root of 84 × 35 =
  40. 40.Digital root of 55 × 93 =

Answer key

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

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