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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 763 · 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 21 × 98 =
  2. 2.Digital root of 97 × 30 =
  3. 3.Digital root of 13 × 94 =
  4. 4.Digital root of 21 × 81 =
  5. 5.Digital root of 91236 =
  6. 6.Digital root of 54140 =
  7. 7.Digital root of 17 × 97 =
  8. 8.Digital root of 75 × 71 =
  9. 9.Digital root of 93020 =
  10. 10.Digital root of 25 × 64 =
  11. 11.Digital root of 68 × 24 =
  12. 12.Digital root of 29 × 98 =
  13. 13.Digital root of 33 × 33 =
  14. 14.Digital root of 83876 =
  15. 15.Digital root of 40851 =
  16. 16.Digital root of 56 × 30 =
  17. 17.Digital root of 90 × 12 =
  18. 18.Digital root of 61651 =
  19. 19.Digital root of 52 × 50 =
  20. 20.Digital root of 32907 =
  21. 21.Digital root of 84686 =
  22. 22.Digital root of 24 × 86 =
  23. 23.Digital root of 84 × 12 =
  24. 24.Digital root of 49889 =
  25. 25.Digital root of 59343 =
  26. 26.Digital root of 48 × 85 =
  27. 27.Digital root of 18664 =
  28. 28.Digital root of 17 × 48 =
  29. 29.Digital root of 921 =
  30. 30.Digital root of 77865 =
  31. 31.Digital root of 35 × 59 =
  32. 32.Digital root of 96044 =
  33. 33.Digital root of 37 × 58 =
  34. 34.Digital root of 73 × 45 =
  35. 35.Digital root of 81 × 92 =
  36. 36.Digital root of 49 × 66 =
  37. 37.Digital root of 24 × 30 =
  38. 38.Digital root of 30 × 57 =
  39. 39.Digital root of 24 × 38 =
  40. 40.Digital root of 89442 =

Answer key

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

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