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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 781 · 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 28 × 63 =
  2. 2.Digital root of 35876 =
  3. 3.Digital root of 42 × 39 =
  4. 4.Digital root of 35976 =
  5. 5.Digital root of 63 × 39 =
  6. 6.Digital root of 47 × 18 =
  7. 7.Digital root of 58 × 58 =
  8. 8.Digital root of 39 × 60 =
  9. 9.Digital root of 8024 =
  10. 10.Digital root of 81 × 37 =
  11. 11.Digital root of 47 × 35 =
  12. 12.Digital root of 24821 =
  13. 13.Digital root of 96 × 60 =
  14. 14.Digital root of 80 × 68 =
  15. 15.Digital root of 97 × 23 =
  16. 16.Digital root of 54014 =
  17. 17.Digital root of 56 × 66 =
  18. 18.Digital root of 78 × 20 =
  19. 19.Digital root of 62 × 43 =
  20. 20.Digital root of 12922 =
  21. 21.Digital root of 93325 =
  22. 22.Digital root of 46647 =
  23. 23.Digital root of 80354 =
  24. 24.Digital root of 71635 =
  25. 25.Digital root of 25 × 75 =
  26. 26.Digital root of 30109 =
  27. 27.Digital root of 18 × 86 =
  28. 28.Digital root of 69720 =
  29. 29.Digital root of 73770 =
  30. 30.Digital root of 29807 =
  31. 31.Digital root of 97439 =
  32. 32.Digital root of 91618 =
  33. 33.Digital root of 80 × 91 =
  34. 34.Digital root of 16 × 31 =
  35. 35.Digital root of 57818 =
  36. 36.Digital root of 84 × 83 =
  37. 37.Digital root of 8075 =
  38. 38.Digital root of 93454 =
  39. 39.Digital root of 98 × 35 =
  40. 40.Digital root of 39421 =

Answer key

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

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