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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 693 · 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 97 × 82 =
  2. 2.Digital root of 31 × 37 =
  3. 3.Digital root of 68806 =
  4. 4.Digital root of 41523 =
  5. 5.Digital root of 35 × 75 =
  6. 6.Digital root of 60 × 95 =
  7. 7.Digital root of 86 × 46 =
  8. 8.Digital root of 9141 =
  9. 9.Digital root of 20 × 24 =
  10. 10.Digital root of 729 =
  11. 11.Digital root of 3555 =
  12. 12.Digital root of 20987 =
  13. 13.Digital root of 35 × 47 =
  14. 14.Digital root of 51 × 70 =
  15. 15.Digital root of 34 × 78 =
  16. 16.Digital root of 35441 =
  17. 17.Digital root of 34 × 45 =
  18. 18.Digital root of 45 × 88 =
  19. 19.Digital root of 55758 =
  20. 20.Digital root of 68102 =
  21. 21.Digital root of 77 × 28 =
  22. 22.Digital root of 64237 =
  23. 23.Digital root of 53809 =
  24. 24.Digital root of 1861 =
  25. 25.Digital root of 94 × 58 =
  26. 26.Digital root of 8283 =
  27. 27.Digital root of 24 × 94 =
  28. 28.Digital root of 27522 =
  29. 29.Digital root of 15 × 44 =
  30. 30.Digital root of 24 × 74 =
  31. 31.Digital root of 6151 =
  32. 32.Digital root of 32 × 19 =
  33. 33.Digital root of 29 × 66 =
  34. 34.Digital root of 90010 =
  35. 35.Digital root of 33 × 49 =
  36. 36.Digital root of 34 × 45 =
  37. 37.Digital root of 2538 =
  38. 38.Digital root of 83 × 43 =
  39. 39.Digital root of 26 × 28 =
  40. 40.Digital root of 11019 =

Answer key

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

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