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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 575 · 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 43 × 38 =
  2. 2.Digital root of 39085 =
  3. 3.Digital root of 90529 =
  4. 4.Digital root of 42 × 57 =
  5. 5.Digital root of 84 × 67 =
  6. 6.Digital root of 86188 =
  7. 7.Digital root of 18658 =
  8. 8.Digital root of 5384 =
  9. 9.Digital root of 4269 =
  10. 10.Digital root of 72003 =
  11. 11.Digital root of 97 × 12 =
  12. 12.Digital root of 51 × 99 =
  13. 13.Digital root of 48643 =
  14. 14.Digital root of 60 × 86 =
  15. 15.Digital root of 28568 =
  16. 16.Digital root of 77789 =
  17. 17.Digital root of 19733 =
  18. 18.Digital root of 41 × 17 =
  19. 19.Digital root of 23191 =
  20. 20.Digital root of 94668 =
  21. 21.Digital root of 40 × 55 =
  22. 22.Digital root of 65 × 34 =
  23. 23.Digital root of 20456 =
  24. 24.Digital root of 50235 =
  25. 25.Digital root of 11471 =
  26. 26.Digital root of 12 × 85 =
  27. 27.Digital root of 26503 =
  28. 28.Digital root of 90598 =
  29. 29.Digital root of 51 × 33 =
  30. 30.Digital root of 13008 =
  31. 31.Digital root of 39725 =
  32. 32.Digital root of 38813 =
  33. 33.Digital root of 99342 =
  34. 34.Digital root of 43 × 64 =
  35. 35.Digital root of 61 × 14 =
  36. 36.Digital root of 56 × 23 =
  37. 37.Digital root of 19 × 31 =
  38. 38.Digital root of 82 × 28 =
  39. 39.Digital root of 33 × 61 =
  40. 40.Digital root of 47 × 21 =

Answer key

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

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