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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 991 · 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 72001 =
  2. 2.Digital root of 90 × 28 =
  3. 3.Digital root of 91 × 53 =
  4. 4.Digital root of 13406 =
  5. 5.Digital root of 12371 =
  6. 6.Digital root of 20 × 17 =
  7. 7.Digital root of 82432 =
  8. 8.Digital root of 92 × 14 =
  9. 9.Digital root of 98471 =
  10. 10.Digital root of 91 × 51 =
  11. 11.Digital root of 82 × 90 =
  12. 12.Digital root of 25 × 57 =
  13. 13.Digital root of 56725 =
  14. 14.Digital root of 73 × 70 =
  15. 15.Digital root of 76 × 14 =
  16. 16.Digital root of 14 × 30 =
  17. 17.Digital root of 42330 =
  18. 18.Digital root of 37194 =
  19. 19.Digital root of 69 × 47 =
  20. 20.Digital root of 46 × 50 =
  21. 21.Digital root of 86 × 87 =
  22. 22.Digital root of 66 × 72 =
  23. 23.Digital root of 54 × 57 =
  24. 24.Digital root of 44788 =
  25. 25.Digital root of 95974 =
  26. 26.Digital root of 36569 =
  27. 27.Digital root of 22 × 33 =
  28. 28.Digital root of 25 × 59 =
  29. 29.Digital root of 68675 =
  30. 30.Digital root of 51 × 52 =
  31. 31.Digital root of 1359 =
  32. 32.Digital root of 20 × 79 =
  33. 33.Digital root of 31057 =
  34. 34.Digital root of 91 × 16 =
  35. 35.Digital root of 87 × 81 =
  36. 36.Digital root of 50 × 60 =
  37. 37.Digital root of 5907 =
  38. 38.Digital root of 12134 =
  39. 39.Digital root of 3012 =
  40. 40.Digital root of 62519 =

Answer key

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

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