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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 109 · 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 23 × 95 =
  2. 2.Digital root of 88 × 90 =
  3. 3.Digital root of 48 × 73 =
  4. 4.Digital root of 47 × 96 =
  5. 5.Digital root of 54719 =
  6. 6.Digital root of 86 × 33 =
  7. 7.Digital root of 58419 =
  8. 8.Digital root of 17313 =
  9. 9.Digital root of 67 × 41 =
  10. 10.Digital root of 17978 =
  11. 11.Digital root of 58 × 40 =
  12. 12.Digital root of 17 × 63 =
  13. 13.Digital root of 33175 =
  14. 14.Digital root of 31 × 21 =
  15. 15.Digital root of 34 × 46 =
  16. 16.Digital root of 21611 =
  17. 17.Digital root of 79091 =
  18. 18.Digital root of 15194 =
  19. 19.Digital root of 9299 =
  20. 20.Digital root of 33140 =
  21. 21.Digital root of 68 × 58 =
  22. 22.Digital root of 26 × 46 =
  23. 23.Digital root of 54227 =
  24. 24.Digital root of 41 × 26 =
  25. 25.Digital root of 73769 =
  26. 26.Digital root of 13 × 77 =
  27. 27.Digital root of 17 × 95 =
  28. 28.Digital root of 60825 =
  29. 29.Digital root of 22 × 35 =
  30. 30.Digital root of 78 × 80 =
  31. 31.Digital root of 79 × 51 =
  32. 32.Digital root of 16281 =
  33. 33.Digital root of 76786 =
  34. 34.Digital root of 88157 =
  35. 35.Digital root of 45007 =
  36. 36.Digital root of 63 × 81 =
  37. 37.Digital root of 53 × 66 =
  38. 38.Digital root of 96 × 20 =
  39. 39.Digital root of 83798 =
  40. 40.Digital root of 57 × 63 =

Answer key

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

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