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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 916 · 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 × 82 =
  2. 2.Digital root of 66 × 88 =
  3. 3.Digital root of 92 × 53 =
  4. 4.Digital root of 27 × 23 =
  5. 5.Digital root of 56915 =
  6. 6.Digital root of 15 × 40 =
  7. 7.Digital root of 40 × 67 =
  8. 8.Digital root of 52 × 53 =
  9. 9.Digital root of 16538 =
  10. 10.Digital root of 30765 =
  11. 11.Digital root of 76 × 85 =
  12. 12.Digital root of 14 × 99 =
  13. 13.Digital root of 18776 =
  14. 14.Digital root of 88558 =
  15. 15.Digital root of 77115 =
  16. 16.Digital root of 84679 =
  17. 17.Digital root of 39504 =
  18. 18.Digital root of 93 × 72 =
  19. 19.Digital root of 12 × 97 =
  20. 20.Digital root of 67 × 19 =
  21. 21.Digital root of 86 × 21 =
  22. 22.Digital root of 58 × 58 =
  23. 23.Digital root of 40 × 27 =
  24. 24.Digital root of 64 × 63 =
  25. 25.Digital root of 40 × 23 =
  26. 26.Digital root of 85249 =
  27. 27.Digital root of 27348 =
  28. 28.Digital root of 99031 =
  29. 29.Digital root of 25 × 76 =
  30. 30.Digital root of 60626 =
  31. 31.Digital root of 84992 =
  32. 32.Digital root of 36471 =
  33. 33.Digital root of 98720 =
  34. 34.Digital root of 17262 =
  35. 35.Digital root of 21591 =
  36. 36.Digital root of 38375 =
  37. 37.Digital root of 81 × 66 =
  38. 38.Digital root of 86 × 46 =
  39. 39.Digital root of 20 × 41 =
  40. 40.Digital root of 22 × 15 =

Answer key

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

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