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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 553 · 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 34 × 21 =
  2. 2.Digital root of 40859 =
  3. 3.Digital root of 71 × 87 =
  4. 4.Digital root of 41 × 24 =
  5. 5.Digital root of 68 × 99 =
  6. 6.Digital root of 45 × 88 =
  7. 7.Digital root of 71 × 30 =
  8. 8.Digital root of 42575 =
  9. 9.Digital root of 19421 =
  10. 10.Digital root of 72 × 76 =
  11. 11.Digital root of 16 × 65 =
  12. 12.Digital root of 18 × 54 =
  13. 13.Digital root of 20 × 46 =
  14. 14.Digital root of 31171 =
  15. 15.Digital root of 71 × 42 =
  16. 16.Digital root of 62 × 66 =
  17. 17.Digital root of 21395 =
  18. 18.Digital root of 33 × 53 =
  19. 19.Digital root of 90030 =
  20. 20.Digital root of 82 × 55 =
  21. 21.Digital root of 56857 =
  22. 22.Digital root of 30 × 53 =
  23. 23.Digital root of 64 × 97 =
  24. 24.Digital root of 99323 =
  25. 25.Digital root of 64002 =
  26. 26.Digital root of 93876 =
  27. 27.Digital root of 62643 =
  28. 28.Digital root of 72 × 37 =
  29. 29.Digital root of 46 × 35 =
  30. 30.Digital root of 22 × 13 =
  31. 31.Digital root of 90999 =
  32. 32.Digital root of 47009 =
  33. 33.Digital root of 58957 =
  34. 34.Digital root of 59 × 94 =
  35. 35.Digital root of 27182 =
  36. 36.Digital root of 86 × 62 =
  37. 37.Digital root of 27 × 96 =
  38. 38.Digital root of 63790 =
  39. 39.Digital root of 43 × 83 =
  40. 40.Digital root of 88 × 14 =

Answer key

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

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