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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 145 · 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 66 × 81 =
  2. 2.Digital root of 14 × 68 =
  3. 3.Digital root of 91118 =
  4. 4.Digital root of 16298 =
  5. 5.Digital root of 73768 =
  6. 6.Digital root of 72 × 12 =
  7. 7.Digital root of 38910 =
  8. 8.Digital root of 64 × 61 =
  9. 9.Digital root of 49 × 85 =
  10. 10.Digital root of 93230 =
  11. 11.Digital root of 98858 =
  12. 12.Digital root of 60676 =
  13. 13.Digital root of 91654 =
  14. 14.Digital root of 26112 =
  15. 15.Digital root of 91 × 25 =
  16. 16.Digital root of 40043 =
  17. 17.Digital root of 61 × 90 =
  18. 18.Digital root of 47194 =
  19. 19.Digital root of 21 × 74 =
  20. 20.Digital root of 10751 =
  21. 21.Digital root of 50393 =
  22. 22.Digital root of 85 × 79 =
  23. 23.Digital root of 68792 =
  24. 24.Digital root of 78742 =
  25. 25.Digital root of 34 × 22 =
  26. 26.Digital root of 21 × 54 =
  27. 27.Digital root of 72793 =
  28. 28.Digital root of 34 × 92 =
  29. 29.Digital root of 83 × 52 =
  30. 30.Digital root of 97850 =
  31. 31.Digital root of 31861 =
  32. 32.Digital root of 21397 =
  33. 33.Digital root of 72013 =
  34. 34.Digital root of 85080 =
  35. 35.Digital root of 73 × 52 =
  36. 36.Digital root of 22158 =
  37. 37.Digital root of 66 × 99 =
  38. 38.Digital root of 81167 =
  39. 39.Digital root of 94 × 69 =
  40. 40.Digital root of 95 × 67 =

Answer key

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

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