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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 432 · 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 59 × 86 =
  2. 2.Digital root of 12 × 46 =
  3. 3.Digital root of 21 × 92 =
  4. 4.Digital root of 64228 =
  5. 5.Digital root of 28432 =
  6. 6.Digital root of 98 × 56 =
  7. 7.Digital root of 58672 =
  8. 8.Digital root of 53 × 60 =
  9. 9.Digital root of 80 × 42 =
  10. 10.Digital root of 46821 =
  11. 11.Digital root of 83101 =
  12. 12.Digital root of 3670 =
  13. 13.Digital root of 98475 =
  14. 14.Digital root of 16485 =
  15. 15.Digital root of 43294 =
  16. 16.Digital root of 99303 =
  17. 17.Digital root of 60 × 17 =
  18. 18.Digital root of 81 × 26 =
  19. 19.Digital root of 52244 =
  20. 20.Digital root of 53 × 31 =
  21. 21.Digital root of 89 × 36 =
  22. 22.Digital root of 40600 =
  23. 23.Digital root of 97853 =
  24. 24.Digital root of 73716 =
  25. 25.Digital root of 40 × 23 =
  26. 26.Digital root of 64 × 93 =
  27. 27.Digital root of 30924 =
  28. 28.Digital root of 10459 =
  29. 29.Digital root of 49 × 49 =
  30. 30.Digital root of 39195 =
  31. 31.Digital root of 99548 =
  32. 32.Digital root of 50 × 16 =
  33. 33.Digital root of 23554 =
  34. 34.Digital root of 24632 =
  35. 35.Digital root of 79307 =
  36. 36.Digital root of 8590 =
  37. 37.Digital root of 37700 =
  38. 38.Digital root of 79912 =
  39. 39.Digital root of 72227 =
  40. 40.Digital root of 72307 =

Answer key

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

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