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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 495 · 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 56 × 78 =
  2. 2.Digital root of 42 × 88 =
  3. 3.Digital root of 19 × 53 =
  4. 4.Digital root of 91232 =
  5. 5.Digital root of 73 × 35 =
  6. 6.Digital root of 43172 =
  7. 7.Digital root of 62103 =
  8. 8.Digital root of 57814 =
  9. 9.Digital root of 93787 =
  10. 10.Digital root of 37809 =
  11. 11.Digital root of 40096 =
  12. 12.Digital root of 37197 =
  13. 13.Digital root of 36 × 82 =
  14. 14.Digital root of 99157 =
  15. 15.Digital root of 49 × 90 =
  16. 16.Digital root of 4832 =
  17. 17.Digital root of 58 × 77 =
  18. 18.Digital root of 40545 =
  19. 19.Digital root of 55647 =
  20. 20.Digital root of 25 × 98 =
  21. 21.Digital root of 34 × 55 =
  22. 22.Digital root of 58 × 21 =
  23. 23.Digital root of 48 × 20 =
  24. 24.Digital root of 78 × 54 =
  25. 25.Digital root of 80478 =
  26. 26.Digital root of 98 × 39 =
  27. 27.Digital root of 685 =
  28. 28.Digital root of 49 × 91 =
  29. 29.Digital root of 83 × 69 =
  30. 30.Digital root of 10141 =
  31. 31.Digital root of 63 × 70 =
  32. 32.Digital root of 23 × 83 =
  33. 33.Digital root of 59663 =
  34. 34.Digital root of 45 × 38 =
  35. 35.Digital root of 61 × 97 =
  36. 36.Digital root of 30616 =
  37. 37.Digital root of 12 × 13 =
  38. 38.Digital root of 31 × 55 =
  39. 39.Digital root of 10190 =
  40. 40.Digital root of 38 × 49 =

Answer key

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

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