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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 411 · 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 82 × 16 =
  2. 2.Digital root of 26438 =
  3. 3.Digital root of 64 × 19 =
  4. 4.Digital root of 38 × 82 =
  5. 5.Digital root of 97 × 29 =
  6. 6.Digital root of 1532 =
  7. 7.Digital root of 34181 =
  8. 8.Digital root of 82341 =
  9. 9.Digital root of 85 × 60 =
  10. 10.Digital root of 47079 =
  11. 11.Digital root of 53 × 49 =
  12. 12.Digital root of 9727 =
  13. 13.Digital root of 26 × 19 =
  14. 14.Digital root of 24 × 34 =
  15. 15.Digital root of 2110 =
  16. 16.Digital root of 79 × 47 =
  17. 17.Digital root of 73 × 66 =
  18. 18.Digital root of 36116 =
  19. 19.Digital root of 24 × 63 =
  20. 20.Digital root of 70 × 44 =
  21. 21.Digital root of 2482 =
  22. 22.Digital root of 14 × 48 =
  23. 23.Digital root of 27 × 43 =
  24. 24.Digital root of 97514 =
  25. 25.Digital root of 40751 =
  26. 26.Digital root of 18 × 94 =
  27. 27.Digital root of 20529 =
  28. 28.Digital root of 30 × 55 =
  29. 29.Digital root of 18 × 49 =
  30. 30.Digital root of 90 × 90 =
  31. 31.Digital root of 9028 =
  32. 32.Digital root of 2198 =
  33. 33.Digital root of 43 × 77 =
  34. 34.Digital root of 31 × 56 =
  35. 35.Digital root of 20 × 46 =
  36. 36.Digital root of 22964 =
  37. 37.Digital root of 60 × 74 =
  38. 38.Digital root of 76049 =
  39. 39.Digital root of 78622 =
  40. 40.Digital root of 29573 =

Answer key

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

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