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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 389 · 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 82 × 53 =
  2. 2.Digital root of 82 × 83 =
  3. 3.Digital root of 94 × 22 =
  4. 4.Digital root of 22 × 25 =
  5. 5.Digital root of 75903 =
  6. 6.Digital root of 81123 =
  7. 7.Digital root of 86982 =
  8. 8.Digital root of 67739 =
  9. 9.Digital root of 9479 =
  10. 10.Digital root of 15661 =
  11. 11.Digital root of 95050 =
  12. 12.Digital root of 59077 =
  13. 13.Digital root of 50106 =
  14. 14.Digital root of 27 × 90 =
  15. 15.Digital root of 53 × 21 =
  16. 16.Digital root of 82 × 16 =
  17. 17.Digital root of 56 × 69 =
  18. 18.Digital root of 3372 =
  19. 19.Digital root of 45 × 48 =
  20. 20.Digital root of 93 × 97 =
  21. 21.Digital root of 61 × 92 =
  22. 22.Digital root of 72170 =
  23. 23.Digital root of 85 × 86 =
  24. 24.Digital root of 90 × 14 =
  25. 25.Digital root of 68 × 15 =
  26. 26.Digital root of 89 × 25 =
  27. 27.Digital root of 73002 =
  28. 28.Digital root of 14 × 88 =
  29. 29.Digital root of 22 × 31 =
  30. 30.Digital root of 24 × 70 =
  31. 31.Digital root of 48 × 99 =
  32. 32.Digital root of 95 × 27 =
  33. 33.Digital root of 22 × 22 =
  34. 34.Digital root of 49914 =
  35. 35.Digital root of 66 × 80 =
  36. 36.Digital root of 72 × 79 =
  37. 37.Digital root of 52 × 92 =
  38. 38.Digital root of 53 × 73 =
  39. 39.Digital root of 97 × 41 =
  40. 40.Digital root of 63 × 19 =

Answer key

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

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