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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 332 · 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 × 72 =
  2. 2.Digital root of 80 × 52 =
  3. 3.Digital root of 38 × 31 =
  4. 4.Digital root of 21030 =
  5. 5.Digital root of 19 × 53 =
  6. 6.Digital root of 37304 =
  7. 7.Digital root of 15539 =
  8. 8.Digital root of 51817 =
  9. 9.Digital root of 95 × 51 =
  10. 10.Digital root of 9590 =
  11. 11.Digital root of 63403 =
  12. 12.Digital root of 22589 =
  13. 13.Digital root of 79 × 93 =
  14. 14.Digital root of 8265 =
  15. 15.Digital root of 23873 =
  16. 16.Digital root of 13877 =
  17. 17.Digital root of 3131 =
  18. 18.Digital root of 52 × 38 =
  19. 19.Digital root of 71 × 17 =
  20. 20.Digital root of 94485 =
  21. 21.Digital root of 28 × 34 =
  22. 22.Digital root of 64876 =
  23. 23.Digital root of 12 × 44 =
  24. 24.Digital root of 19 × 72 =
  25. 25.Digital root of 99 × 78 =
  26. 26.Digital root of 90507 =
  27. 27.Digital root of 66936 =
  28. 28.Digital root of 19489 =
  29. 29.Digital root of 93 × 34 =
  30. 30.Digital root of 45571 =
  31. 31.Digital root of 87837 =
  32. 32.Digital root of 25 × 22 =
  33. 33.Digital root of 11930 =
  34. 34.Digital root of 21944 =
  35. 35.Digital root of 89033 =
  36. 36.Digital root of 99 × 66 =
  37. 37.Digital root of 52683 =
  38. 38.Digital root of 98 × 22 =
  39. 39.Digital root of 17 × 87 =
  40. 40.Digital root of 28 × 81 =

Answer key

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

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