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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 391 · 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 3130 =
  2. 2.Digital root of 95636 =
  3. 3.Digital root of 41311 =
  4. 4.Digital root of 12 × 97 =
  5. 5.Digital root of 22795 =
  6. 6.Digital root of 14 × 54 =
  7. 7.Digital root of 13 × 25 =
  8. 8.Digital root of 91605 =
  9. 9.Digital root of 23194 =
  10. 10.Digital root of 87949 =
  11. 11.Digital root of 73 × 65 =
  12. 12.Digital root of 48581 =
  13. 13.Digital root of 40 × 67 =
  14. 14.Digital root of 32 × 32 =
  15. 15.Digital root of 89 × 25 =
  16. 16.Digital root of 23 × 33 =
  17. 17.Digital root of 2946 =
  18. 18.Digital root of 16663 =
  19. 19.Digital root of 31 × 17 =
  20. 20.Digital root of 17 × 35 =
  21. 21.Digital root of 11201 =
  22. 22.Digital root of 73505 =
  23. 23.Digital root of 18 × 47 =
  24. 24.Digital root of 38 × 64 =
  25. 25.Digital root of 41 × 47 =
  26. 26.Digital root of 92472 =
  27. 27.Digital root of 45043 =
  28. 28.Digital root of 83428 =
  29. 29.Digital root of 83 × 62 =
  30. 30.Digital root of 40 × 63 =
  31. 31.Digital root of 65 × 36 =
  32. 32.Digital root of 58 × 79 =
  33. 33.Digital root of 54 × 36 =
  34. 34.Digital root of 49 × 47 =
  35. 35.Digital root of 9546 =
  36. 36.Digital root of 72470 =
  37. 37.Digital root of 44 × 42 =
  38. 38.Digital root of 54 × 60 =
  39. 39.Digital root of 8604 =
  40. 40.Digital root of 28 × 80 =

Answer key

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

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