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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 885 · 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 84068 =
  2. 2.Digital root of 56265 =
  3. 3.Digital root of 80 × 51 =
  4. 4.Digital root of 29 × 27 =
  5. 5.Digital root of 1477 =
  6. 6.Digital root of 47 × 23 =
  7. 7.Digital root of 72 × 30 =
  8. 8.Digital root of 13545 =
  9. 9.Digital root of 56693 =
  10. 10.Digital root of 64 × 39 =
  11. 11.Digital root of 26158 =
  12. 12.Digital root of 4151 =
  13. 13.Digital root of 21180 =
  14. 14.Digital root of 47 × 32 =
  15. 15.Digital root of 33 × 19 =
  16. 16.Digital root of 77 × 36 =
  17. 17.Digital root of 16 × 77 =
  18. 18.Digital root of 28 × 89 =
  19. 19.Digital root of 21410 =
  20. 20.Digital root of 21 × 23 =
  21. 21.Digital root of 61 × 89 =
  22. 22.Digital root of 18223 =
  23. 23.Digital root of 70 × 66 =
  24. 24.Digital root of 11491 =
  25. 25.Digital root of 74591 =
  26. 26.Digital root of 74 × 18 =
  27. 27.Digital root of 17 × 56 =
  28. 28.Digital root of 61818 =
  29. 29.Digital root of 74 × 50 =
  30. 30.Digital root of 58351 =
  31. 31.Digital root of 44949 =
  32. 32.Digital root of 53252 =
  33. 33.Digital root of 78161 =
  34. 34.Digital root of 36 × 71 =
  35. 35.Digital root of 72 × 17 =
  36. 36.Digital root of 98 × 93 =
  37. 37.Digital root of 61 × 97 =
  38. 38.Digital root of 30914 =
  39. 39.Digital root of 78 × 66 =
  40. 40.Digital root of 27570 =

Answer key

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

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