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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 414 · 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 95 × 94 =
  2. 2.Digital root of 31 × 81 =
  3. 3.Digital root of 18615 =
  4. 4.Digital root of 45 × 79 =
  5. 5.Digital root of 22161 =
  6. 6.Digital root of 32 × 41 =
  7. 7.Digital root of 51 × 17 =
  8. 8.Digital root of 82188 =
  9. 9.Digital root of 28 × 80 =
  10. 10.Digital root of 26 × 48 =
  11. 11.Digital root of 78 × 46 =
  12. 12.Digital root of 19 × 98 =
  13. 13.Digital root of 96 × 34 =
  14. 14.Digital root of 70 × 78 =
  15. 15.Digital root of 72405 =
  16. 16.Digital root of 23112 =
  17. 17.Digital root of 17 × 17 =
  18. 18.Digital root of 59 × 85 =
  19. 19.Digital root of 35 × 62 =
  20. 20.Digital root of 98833 =
  21. 21.Digital root of 71 × 57 =
  22. 22.Digital root of 59 × 80 =
  23. 23.Digital root of 83 × 44 =
  24. 24.Digital root of 26900 =
  25. 25.Digital root of 73707 =
  26. 26.Digital root of 62035 =
  27. 27.Digital root of 34921 =
  28. 28.Digital root of 13 × 28 =
  29. 29.Digital root of 33 × 23 =
  30. 30.Digital root of 54273 =
  31. 31.Digital root of 90269 =
  32. 32.Digital root of 86294 =
  33. 33.Digital root of 64 × 88 =
  34. 34.Digital root of 60800 =
  35. 35.Digital root of 28956 =
  36. 36.Digital root of 62926 =
  37. 37.Digital root of 20243 =
  38. 38.Digital root of 13 × 86 =
  39. 39.Digital root of 85 × 13 =
  40. 40.Digital root of 21 × 61 =

Answer key

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

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