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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 120 · 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 30 × 90 =
  2. 2.Digital root of 62 × 91 =
  3. 3.Digital root of 26 × 94 =
  4. 4.Digital root of 16894 =
  5. 5.Digital root of 88425 =
  6. 6.Digital root of 39715 =
  7. 7.Digital root of 41 × 63 =
  8. 8.Digital root of 99 × 37 =
  9. 9.Digital root of 1271 =
  10. 10.Digital root of 84 × 22 =
  11. 11.Digital root of 22 × 35 =
  12. 12.Digital root of 37 × 83 =
  13. 13.Digital root of 89149 =
  14. 14.Digital root of 36928 =
  15. 15.Digital root of 60528 =
  16. 16.Digital root of 81 × 47 =
  17. 17.Digital root of 91615 =
  18. 18.Digital root of 38649 =
  19. 19.Digital root of 86561 =
  20. 20.Digital root of 40787 =
  21. 21.Digital root of 54 × 32 =
  22. 22.Digital root of 76 × 96 =
  23. 23.Digital root of 17421 =
  24. 24.Digital root of 63791 =
  25. 25.Digital root of 62505 =
  26. 26.Digital root of 9587 =
  27. 27.Digital root of 31 × 78 =
  28. 28.Digital root of 32921 =
  29. 29.Digital root of 24816 =
  30. 30.Digital root of 77108 =
  31. 31.Digital root of 17 × 83 =
  32. 32.Digital root of 20634 =
  33. 33.Digital root of 82201 =
  34. 34.Digital root of 30 × 84 =
  35. 35.Digital root of 63964 =
  36. 36.Digital root of 43 × 74 =
  37. 37.Digital root of 9510 =
  38. 38.Digital root of 40 × 51 =
  39. 39.Digital root of 73 × 29 =
  40. 40.Digital root of 58 × 22 =

Answer key

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

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