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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 708 · 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 99073 =
  2. 2.Digital root of 20507 =
  3. 3.Digital root of 22 × 77 =
  4. 4.Digital root of 93 × 17 =
  5. 5.Digital root of 73 × 32 =
  6. 6.Digital root of 40 × 18 =
  7. 7.Digital root of 2727 =
  8. 8.Digital root of 57580 =
  9. 9.Digital root of 28 × 33 =
  10. 10.Digital root of 3092 =
  11. 11.Digital root of 62 × 57 =
  12. 12.Digital root of 45 × 26 =
  13. 13.Digital root of 90944 =
  14. 14.Digital root of 47183 =
  15. 15.Digital root of 89745 =
  16. 16.Digital root of 83446 =
  17. 17.Digital root of 93373 =
  18. 18.Digital root of 19 × 29 =
  19. 19.Digital root of 1047 =
  20. 20.Digital root of 26013 =
  21. 21.Digital root of 74703 =
  22. 22.Digital root of 28512 =
  23. 23.Digital root of 71 × 71 =
  24. 24.Digital root of 31 × 52 =
  25. 25.Digital root of 9051 =
  26. 26.Digital root of 47938 =
  27. 27.Digital root of 6450 =
  28. 28.Digital root of 78 × 60 =
  29. 29.Digital root of 70 × 36 =
  30. 30.Digital root of 99364 =
  31. 31.Digital root of 216 =
  32. 32.Digital root of 61 × 83 =
  33. 33.Digital root of 15 × 39 =
  34. 34.Digital root of 46500 =
  35. 35.Digital root of 92150 =
  36. 36.Digital root of 79564 =
  37. 37.Digital root of 97 × 74 =
  38. 38.Digital root of 18856 =
  39. 39.Digital root of 14 × 78 =
  40. 40.Digital root of 15 × 34 =

Answer key

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

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