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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 764 · 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 20 × 17 =
  2. 2.Digital root of 23133 =
  3. 3.Digital root of 76 × 23 =
  4. 4.Digital root of 2874 =
  5. 5.Digital root of 27 × 41 =
  6. 6.Digital root of 22 × 16 =
  7. 7.Digital root of 35 × 33 =
  8. 8.Digital root of 28953 =
  9. 9.Digital root of 35 × 70 =
  10. 10.Digital root of 42646 =
  11. 11.Digital root of 80 × 29 =
  12. 12.Digital root of 37467 =
  13. 13.Digital root of 56242 =
  14. 14.Digital root of 55 × 68 =
  15. 15.Digital root of 75 × 51 =
  16. 16.Digital root of 20 × 49 =
  17. 17.Digital root of 3102 =
  18. 18.Digital root of 70165 =
  19. 19.Digital root of 81315 =
  20. 20.Digital root of 18896 =
  21. 21.Digital root of 6865 =
  22. 22.Digital root of 34537 =
  23. 23.Digital root of 77295 =
  24. 24.Digital root of 27464 =
  25. 25.Digital root of 26 × 26 =
  26. 26.Digital root of 66 × 79 =
  27. 27.Digital root of 68990 =
  28. 28.Digital root of 46415 =
  29. 29.Digital root of 10008 =
  30. 30.Digital root of 49 × 15 =
  31. 31.Digital root of 81436 =
  32. 32.Digital root of 18 × 36 =
  33. 33.Digital root of 73 × 17 =
  34. 34.Digital root of 13489 =
  35. 35.Digital root of 48 × 73 =
  36. 36.Digital root of 75 × 53 =
  37. 37.Digital root of 15844 =
  38. 38.Digital root of 51 × 53 =
  39. 39.Digital root of 15292 =
  40. 40.Digital root of 39 × 70 =

Answer key

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

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