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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 812 · 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 53 × 99 =
  2. 2.Digital root of 77 × 23 =
  3. 3.Digital root of 19573 =
  4. 4.Digital root of 41 × 16 =
  5. 5.Digital root of 60945 =
  6. 6.Digital root of 63681 =
  7. 7.Digital root of 21 × 85 =
  8. 8.Digital root of 34488 =
  9. 9.Digital root of 536 =
  10. 10.Digital root of 21 × 82 =
  11. 11.Digital root of 77 × 55 =
  12. 12.Digital root of 81 × 77 =
  13. 13.Digital root of 80 × 16 =
  14. 14.Digital root of 17387 =
  15. 15.Digital root of 77228 =
  16. 16.Digital root of 36714 =
  17. 17.Digital root of 1831 =
  18. 18.Digital root of 45084 =
  19. 19.Digital root of 72 × 74 =
  20. 20.Digital root of 68 × 86 =
  21. 21.Digital root of 27048 =
  22. 22.Digital root of 33 × 31 =
  23. 23.Digital root of 28231 =
  24. 24.Digital root of 44429 =
  25. 25.Digital root of 12 × 78 =
  26. 26.Digital root of 85 × 71 =
  27. 27.Digital root of 54 × 40 =
  28. 28.Digital root of 49 × 33 =
  29. 29.Digital root of 58 × 69 =
  30. 30.Digital root of 23 × 73 =
  31. 31.Digital root of 91809 =
  32. 32.Digital root of 73 × 76 =
  33. 33.Digital root of 80 × 32 =
  34. 34.Digital root of 50355 =
  35. 35.Digital root of 22 × 57 =
  36. 36.Digital root of 87281 =
  37. 37.Digital root of 69719 =
  38. 38.Digital root of 618 =
  39. 39.Digital root of 78277 =
  40. 40.Digital root of 93 × 63 =

Answer key

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

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