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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 818 · 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 17452 =
  2. 2.Digital root of 19588 =
  3. 3.Digital root of 7956 =
  4. 4.Digital root of 91583 =
  5. 5.Digital root of 30463 =
  6. 6.Digital root of 90 × 43 =
  7. 7.Digital root of 64 × 31 =
  8. 8.Digital root of 94 × 69 =
  9. 9.Digital root of 73736 =
  10. 10.Digital root of 78058 =
  11. 11.Digital root of 39708 =
  12. 12.Digital root of 16478 =
  13. 13.Digital root of 27 × 96 =
  14. 14.Digital root of 17012 =
  15. 15.Digital root of 90 × 61 =
  16. 16.Digital root of 28 × 32 =
  17. 17.Digital root of 99 × 28 =
  18. 18.Digital root of 15 × 83 =
  19. 19.Digital root of 65477 =
  20. 20.Digital root of 87 × 80 =
  21. 21.Digital root of 95 × 69 =
  22. 22.Digital root of 81 × 85 =
  23. 23.Digital root of 59 × 18 =
  24. 24.Digital root of 29 × 59 =
  25. 25.Digital root of 28 × 35 =
  26. 26.Digital root of 86978 =
  27. 27.Digital root of 25 × 44 =
  28. 28.Digital root of 17 × 38 =
  29. 29.Digital root of 25259 =
  30. 30.Digital root of 36 × 31 =
  31. 31.Digital root of 24035 =
  32. 32.Digital root of 56 × 27 =
  33. 33.Digital root of 40635 =
  34. 34.Digital root of 69 × 51 =
  35. 35.Digital root of 22584 =
  36. 36.Digital root of 13 × 82 =
  37. 37.Digital root of 41 × 49 =
  38. 38.Digital root of 95704 =
  39. 39.Digital root of 9211 =
  40. 40.Digital root of 70003 =

Answer key

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

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