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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 831 · 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 20021 =
  2. 2.Digital root of 71019 =
  3. 3.Digital root of 74 × 82 =
  4. 4.Digital root of 61262 =
  5. 5.Digital root of 94603 =
  6. 6.Digital root of 21 × 25 =
  7. 7.Digital root of 27 × 82 =
  8. 8.Digital root of 59 × 65 =
  9. 9.Digital root of 81799 =
  10. 10.Digital root of 13830 =
  11. 11.Digital root of 37387 =
  12. 12.Digital root of 32637 =
  13. 13.Digital root of 11540 =
  14. 14.Digital root of 99 × 74 =
  15. 15.Digital root of 48070 =
  16. 16.Digital root of 53 × 58 =
  17. 17.Digital root of 21623 =
  18. 18.Digital root of 63713 =
  19. 19.Digital root of 77802 =
  20. 20.Digital root of 86 × 67 =
  21. 21.Digital root of 38053 =
  22. 22.Digital root of 6830 =
  23. 23.Digital root of 84931 =
  24. 24.Digital root of 14606 =
  25. 25.Digital root of 88 × 80 =
  26. 26.Digital root of 15 × 81 =
  27. 27.Digital root of 24304 =
  28. 28.Digital root of 87115 =
  29. 29.Digital root of 15 × 44 =
  30. 30.Digital root of 54 × 14 =
  31. 31.Digital root of 49 × 46 =
  32. 32.Digital root of 66 × 78 =
  33. 33.Digital root of 44718 =
  34. 34.Digital root of 41 × 53 =
  35. 35.Digital root of 4421 =
  36. 36.Digital root of 73 × 89 =
  37. 37.Digital root of 1700 =
  38. 38.Digital root of 95843 =
  39. 39.Digital root of 23 × 18 =
  40. 40.Digital root of 43 × 86 =

Answer key

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

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