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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 521 · 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 15 × 92 =
  2. 2.Digital root of 43916 =
  3. 3.Digital root of 52 × 75 =
  4. 4.Digital root of 52 × 82 =
  5. 5.Digital root of 63762 =
  6. 6.Digital root of 27379 =
  7. 7.Digital root of 75 × 19 =
  8. 8.Digital root of 97481 =
  9. 9.Digital root of 79369 =
  10. 10.Digital root of 7985 =
  11. 11.Digital root of 6206 =
  12. 12.Digital root of 34 × 15 =
  13. 13.Digital root of 7327 =
  14. 14.Digital root of 49 × 35 =
  15. 15.Digital root of 45 × 30 =
  16. 16.Digital root of 32173 =
  17. 17.Digital root of 53 × 23 =
  18. 18.Digital root of 38 × 12 =
  19. 19.Digital root of 51613 =
  20. 20.Digital root of 4927 =
  21. 21.Digital root of 58 × 56 =
  22. 22.Digital root of 18 × 12 =
  23. 23.Digital root of 84594 =
  24. 24.Digital root of 10495 =
  25. 25.Digital root of 31 × 82 =
  26. 26.Digital root of 22 × 41 =
  27. 27.Digital root of 75 × 59 =
  28. 28.Digital root of 50 × 13 =
  29. 29.Digital root of 42190 =
  30. 30.Digital root of 57208 =
  31. 31.Digital root of 26503 =
  32. 32.Digital root of 21 × 90 =
  33. 33.Digital root of 51 × 89 =
  34. 34.Digital root of 64 × 21 =
  35. 35.Digital root of 53182 =
  36. 36.Digital root of 88 × 70 =
  37. 37.Digital root of 56330 =
  38. 38.Digital root of 43561 =
  39. 39.Digital root of 35919 =
  40. 40.Digital root of 30035 =

Answer key

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

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