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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 472 · 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 16 × 37 =
  2. 2.Digital root of 91170 =
  3. 3.Digital root of 36614 =
  4. 4.Digital root of 21 × 23 =
  5. 5.Digital root of 16 × 83 =
  6. 6.Digital root of 88 × 70 =
  7. 7.Digital root of 68 × 68 =
  8. 8.Digital root of 23385 =
  9. 9.Digital root of 4575 =
  10. 10.Digital root of 46 × 59 =
  11. 11.Digital root of 35733 =
  12. 12.Digital root of 5249 =
  13. 13.Digital root of 94 × 59 =
  14. 14.Digital root of 82717 =
  15. 15.Digital root of 63 × 26 =
  16. 16.Digital root of 27319 =
  17. 17.Digital root of 93804 =
  18. 18.Digital root of 71 × 26 =
  19. 19.Digital root of 31 × 48 =
  20. 20.Digital root of 50 × 82 =
  21. 21.Digital root of 82684 =
  22. 22.Digital root of 91 × 47 =
  23. 23.Digital root of 78 × 36 =
  24. 24.Digital root of 39577 =
  25. 25.Digital root of 93 × 62 =
  26. 26.Digital root of 68 × 78 =
  27. 27.Digital root of 82526 =
  28. 28.Digital root of 41874 =
  29. 29.Digital root of 76 × 84 =
  30. 30.Digital root of 92300 =
  31. 31.Digital root of 4677 =
  32. 32.Digital root of 87625 =
  33. 33.Digital root of 46589 =
  34. 34.Digital root of 60539 =
  35. 35.Digital root of 21 × 25 =
  36. 36.Digital root of 92 × 56 =
  37. 37.Digital root of 43872 =
  38. 38.Digital root of 11665 =
  39. 39.Digital root of 97 × 90 =
  40. 40.Digital root of 54 × 27 =

Answer key

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

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