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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 300 · 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 79 × 24 =
  2. 2.Digital root of 91 × 40 =
  3. 3.Digital root of 56 × 35 =
  4. 4.Digital root of 44 × 74 =
  5. 5.Digital root of 42861 =
  6. 6.Digital root of 87264 =
  7. 7.Digital root of 99 × 29 =
  8. 8.Digital root of 15 × 65 =
  9. 9.Digital root of 55 × 59 =
  10. 10.Digital root of 82040 =
  11. 11.Digital root of 53 × 85 =
  12. 12.Digital root of 69 × 97 =
  13. 13.Digital root of 21 × 66 =
  14. 14.Digital root of 19 × 87 =
  15. 15.Digital root of 56 × 89 =
  16. 16.Digital root of 29381 =
  17. 17.Digital root of 93 × 97 =
  18. 18.Digital root of 87513 =
  19. 19.Digital root of 41146 =
  20. 20.Digital root of 59 × 85 =
  21. 21.Digital root of 31 × 22 =
  22. 22.Digital root of 21830 =
  23. 23.Digital root of 72528 =
  24. 24.Digital root of 72429 =
  25. 25.Digital root of 81864 =
  26. 26.Digital root of 70642 =
  27. 27.Digital root of 62040 =
  28. 28.Digital root of 16299 =
  29. 29.Digital root of 51 × 37 =
  30. 30.Digital root of 40 × 91 =
  31. 31.Digital root of 74365 =
  32. 32.Digital root of 35879 =
  33. 33.Digital root of 2015 =
  34. 34.Digital root of 75 × 60 =
  35. 35.Digital root of 51719 =
  36. 36.Digital root of 22602 =
  37. 37.Digital root of 7043 =
  38. 38.Digital root of 5883 =
  39. 39.Digital root of 84 × 65 =
  40. 40.Digital root of 18735 =

Answer key

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

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