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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 719 · 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 13162 =
  2. 2.Digital root of 34009 =
  3. 3.Digital root of 30 × 28 =
  4. 4.Digital root of 98 × 19 =
  5. 5.Digital root of 51399 =
  6. 6.Digital root of 78 × 39 =
  7. 7.Digital root of 93606 =
  8. 8.Digital root of 9812 =
  9. 9.Digital root of 42622 =
  10. 10.Digital root of 34005 =
  11. 11.Digital root of 58565 =
  12. 12.Digital root of 80793 =
  13. 13.Digital root of 14778 =
  14. 14.Digital root of 31564 =
  15. 15.Digital root of 93656 =
  16. 16.Digital root of 4295 =
  17. 17.Digital root of 70838 =
  18. 18.Digital root of 52227 =
  19. 19.Digital root of 37597 =
  20. 20.Digital root of 12 × 83 =
  21. 21.Digital root of 51 × 96 =
  22. 22.Digital root of 91 × 19 =
  23. 23.Digital root of 89524 =
  24. 24.Digital root of 18 × 29 =
  25. 25.Digital root of 58 × 79 =
  26. 26.Digital root of 53 × 35 =
  27. 27.Digital root of 99 × 72 =
  28. 28.Digital root of 23 × 31 =
  29. 29.Digital root of 78 × 49 =
  30. 30.Digital root of 20294 =
  31. 31.Digital root of 47 × 89 =
  32. 32.Digital root of 47184 =
  33. 33.Digital root of 10654 =
  34. 34.Digital root of 13 × 58 =
  35. 35.Digital root of 36 × 64 =
  36. 36.Digital root of 84020 =
  37. 37.Digital root of 92289 =
  38. 38.Digital root of 2289 =
  39. 39.Digital root of 38072 =
  40. 40.Digital root of 95 × 39 =

Answer key

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

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