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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 246 · 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 67 × 30 =
  2. 2.Digital root of 30 × 70 =
  3. 3.Digital root of 50 × 29 =
  4. 4.Digital root of 47752 =
  5. 5.Digital root of 45 × 26 =
  6. 6.Digital root of 12211 =
  7. 7.Digital root of 15450 =
  8. 8.Digital root of 44 × 25 =
  9. 9.Digital root of 20226 =
  10. 10.Digital root of 35 × 47 =
  11. 11.Digital root of 58478 =
  12. 12.Digital root of 83502 =
  13. 13.Digital root of 20647 =
  14. 14.Digital root of 97 × 27 =
  15. 15.Digital root of 68293 =
  16. 16.Digital root of 95 × 64 =
  17. 17.Digital root of 49736 =
  18. 18.Digital root of 20022 =
  19. 19.Digital root of 93 × 12 =
  20. 20.Digital root of 31 × 49 =
  21. 21.Digital root of 25325 =
  22. 22.Digital root of 20480 =
  23. 23.Digital root of 22 × 30 =
  24. 24.Digital root of 84 × 30 =
  25. 25.Digital root of 12356 =
  26. 26.Digital root of 56 × 79 =
  27. 27.Digital root of 89 × 46 =
  28. 28.Digital root of 23945 =
  29. 29.Digital root of 8816 =
  30. 30.Digital root of 99 × 25 =
  31. 31.Digital root of 28 × 56 =
  32. 32.Digital root of 36958 =
  33. 33.Digital root of 85675 =
  34. 34.Digital root of 71 × 28 =
  35. 35.Digital root of 40440 =
  36. 36.Digital root of 97 × 88 =
  37. 37.Digital root of 15862 =
  38. 38.Digital root of 92838 =
  39. 39.Digital root of 1314 =
  40. 40.Digital root of 1141 =

Answer key

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

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