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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 242 · 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 56 × 41 =
  2. 2.Digital root of 17 × 57 =
  3. 3.Digital root of 58 × 20 =
  4. 4.Digital root of 14 × 57 =
  5. 5.Digital root of 85 × 54 =
  6. 6.Digital root of 51 × 44 =
  7. 7.Digital root of 41004 =
  8. 8.Digital root of 167 =
  9. 9.Digital root of 52108 =
  10. 10.Digital root of 33 × 28 =
  11. 11.Digital root of 40 × 81 =
  12. 12.Digital root of 966 =
  13. 13.Digital root of 71 × 41 =
  14. 14.Digital root of 63220 =
  15. 15.Digital root of 58683 =
  16. 16.Digital root of 83 × 23 =
  17. 17.Digital root of 31147 =
  18. 18.Digital root of 63926 =
  19. 19.Digital root of 67787 =
  20. 20.Digital root of 30 × 75 =
  21. 21.Digital root of 79357 =
  22. 22.Digital root of 85283 =
  23. 23.Digital root of 27 × 46 =
  24. 24.Digital root of 20 × 29 =
  25. 25.Digital root of 46701 =
  26. 26.Digital root of 97 × 13 =
  27. 27.Digital root of 71900 =
  28. 28.Digital root of 65 × 12 =
  29. 29.Digital root of 30 × 24 =
  30. 30.Digital root of 28402 =
  31. 31.Digital root of 10028 =
  32. 32.Digital root of 31 × 93 =
  33. 33.Digital root of 80067 =
  34. 34.Digital root of 70 × 39 =
  35. 35.Digital root of 15 × 67 =
  36. 36.Digital root of 60 × 77 =
  37. 37.Digital root of 22995 =
  38. 38.Digital root of 20770 =
  39. 39.Digital root of 61 × 55 =
  40. 40.Digital root of 41 × 67 =

Answer key

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

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