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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 482 · 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 38 × 83 =
  2. 2.Digital root of 38110 =
  3. 3.Digital root of 36 × 61 =
  4. 4.Digital root of 78027 =
  5. 5.Digital root of 37 × 95 =
  6. 6.Digital root of 82 × 70 =
  7. 7.Digital root of 38 × 65 =
  8. 8.Digital root of 87042 =
  9. 9.Digital root of 25 × 54 =
  10. 10.Digital root of 95 × 65 =
  11. 11.Digital root of 81 × 24 =
  12. 12.Digital root of 46 × 21 =
  13. 13.Digital root of 14074 =
  14. 14.Digital root of 81 × 69 =
  15. 15.Digital root of 98439 =
  16. 16.Digital root of 69 × 76 =
  17. 17.Digital root of 58 × 32 =
  18. 18.Digital root of 98 × 58 =
  19. 19.Digital root of 29071 =
  20. 20.Digital root of 31958 =
  21. 21.Digital root of 22440 =
  22. 22.Digital root of 77030 =
  23. 23.Digital root of 72 × 90 =
  24. 24.Digital root of 28981 =
  25. 25.Digital root of 31 × 52 =
  26. 26.Digital root of 51 × 90 =
  27. 27.Digital root of 86013 =
  28. 28.Digital root of 71 × 24 =
  29. 29.Digital root of 71108 =
  30. 30.Digital root of 95658 =
  31. 31.Digital root of 90848 =
  32. 32.Digital root of 85 × 22 =
  33. 33.Digital root of 45 × 26 =
  34. 34.Digital root of 56618 =
  35. 35.Digital root of 37 × 25 =
  36. 36.Digital root of 96 × 42 =
  37. 37.Digital root of 70 × 73 =
  38. 38.Digital root of 16568 =
  39. 39.Digital root of 96413 =
  40. 40.Digital root of 47636 =

Answer key

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

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