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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 906 · 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 22 × 20 =
  2. 2.Digital root of 36 × 80 =
  3. 3.Digital root of 66175 =
  4. 4.Digital root of 48 × 62 =
  5. 5.Digital root of 92275 =
  6. 6.Digital root of 91 × 59 =
  7. 7.Digital root of 50767 =
  8. 8.Digital root of 97 × 82 =
  9. 9.Digital root of 98 × 16 =
  10. 10.Digital root of 97764 =
  11. 11.Digital root of 12718 =
  12. 12.Digital root of 45 × 83 =
  13. 13.Digital root of 85 × 36 =
  14. 14.Digital root of 15093 =
  15. 15.Digital root of 24348 =
  16. 16.Digital root of 97 × 27 =
  17. 17.Digital root of 8371 =
  18. 18.Digital root of 51 × 89 =
  19. 19.Digital root of 77167 =
  20. 20.Digital root of 27355 =
  21. 21.Digital root of 23189 =
  22. 22.Digital root of 72666 =
  23. 23.Digital root of 15562 =
  24. 24.Digital root of 4518 =
  25. 25.Digital root of 30158 =
  26. 26.Digital root of 34 × 64 =
  27. 27.Digital root of 75491 =
  28. 28.Digital root of 20 × 24 =
  29. 29.Digital root of 75685 =
  30. 30.Digital root of 40 × 25 =
  31. 31.Digital root of 41 × 69 =
  32. 32.Digital root of 49 × 25 =
  33. 33.Digital root of 95 × 73 =
  34. 34.Digital root of 90292 =
  35. 35.Digital root of 15117 =
  36. 36.Digital root of 4564 =
  37. 37.Digital root of 54 × 34 =
  38. 38.Digital root of 45664 =
  39. 39.Digital root of 68433 =
  40. 40.Digital root of 79 × 77 =

Answer key

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

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