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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 73 · 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 42 × 97 =
  2. 2.Digital root of 58 × 14 =
  3. 3.Digital root of 71 × 67 =
  4. 4.Digital root of 82760 =
  5. 5.Digital root of 29303 =
  6. 6.Digital root of 40856 =
  7. 7.Digital root of 43 × 86 =
  8. 8.Digital root of 18627 =
  9. 9.Digital root of 97373 =
  10. 10.Digital root of 86512 =
  11. 11.Digital root of 80 × 12 =
  12. 12.Digital root of 51473 =
  13. 13.Digital root of 64307 =
  14. 14.Digital root of 21 × 41 =
  15. 15.Digital root of 96 × 18 =
  16. 16.Digital root of 19854 =
  17. 17.Digital root of 77 × 53 =
  18. 18.Digital root of 19 × 73 =
  19. 19.Digital root of 77 × 24 =
  20. 20.Digital root of 38 × 65 =
  21. 21.Digital root of 18 × 43 =
  22. 22.Digital root of 37 × 71 =
  23. 23.Digital root of 79159 =
  24. 24.Digital root of 79 × 22 =
  25. 25.Digital root of 98145 =
  26. 26.Digital root of 21 × 54 =
  27. 27.Digital root of 55 × 65 =
  28. 28.Digital root of 97 × 58 =
  29. 29.Digital root of 72210 =
  30. 30.Digital root of 12 × 46 =
  31. 31.Digital root of 6441 =
  32. 32.Digital root of 93 × 21 =
  33. 33.Digital root of 92 × 85 =
  34. 34.Digital root of 20700 =
  35. 35.Digital root of 95 × 52 =
  36. 36.Digital root of 54583 =
  37. 37.Digital root of 21 × 17 =
  38. 38.Digital root of 1287 =
  39. 39.Digital root of 59231 =
  40. 40.Digital root of 18087 =

Answer key

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

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