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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 305 · 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 84361 =
  2. 2.Digital root of 72 × 31 =
  3. 3.Digital root of 18318 =
  4. 4.Digital root of 85830 =
  5. 5.Digital root of 39526 =
  6. 6.Digital root of 40171 =
  7. 7.Digital root of 50 × 73 =
  8. 8.Digital root of 19 × 93 =
  9. 9.Digital root of 82299 =
  10. 10.Digital root of 81428 =
  11. 11.Digital root of 75 × 18 =
  12. 12.Digital root of 25332 =
  13. 13.Digital root of 85 × 80 =
  14. 14.Digital root of 4971 =
  15. 15.Digital root of 7620 =
  16. 16.Digital root of 45 × 83 =
  17. 17.Digital root of 49 × 90 =
  18. 18.Digital root of 63401 =
  19. 19.Digital root of 28888 =
  20. 20.Digital root of 50 × 41 =
  21. 21.Digital root of 1800 =
  22. 22.Digital root of 86949 =
  23. 23.Digital root of 79050 =
  24. 24.Digital root of 30 × 96 =
  25. 25.Digital root of 24000 =
  26. 26.Digital root of 44 × 89 =
  27. 27.Digital root of 28 × 43 =
  28. 28.Digital root of 31 × 58 =
  29. 29.Digital root of 9469 =
  30. 30.Digital root of 91 × 36 =
  31. 31.Digital root of 76386 =
  32. 32.Digital root of 99 × 12 =
  33. 33.Digital root of 4850 =
  34. 34.Digital root of 34 × 32 =
  35. 35.Digital root of 25179 =
  36. 36.Digital root of 33446 =
  37. 37.Digital root of 36922 =
  38. 38.Digital root of 71296 =
  39. 39.Digital root of 668 =
  40. 40.Digital root of 54 × 42 =

Answer key

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

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