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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 397 · 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 7478 =
  2. 2.Digital root of 53287 =
  3. 3.Digital root of 7534 =
  4. 4.Digital root of 52 × 79 =
  5. 5.Digital root of 67 × 89 =
  6. 6.Digital root of 48054 =
  7. 7.Digital root of 18820 =
  8. 8.Digital root of 5290 =
  9. 9.Digital root of 53426 =
  10. 10.Digital root of 89 × 55 =
  11. 11.Digital root of 22 × 15 =
  12. 12.Digital root of 39133 =
  13. 13.Digital root of 65 × 12 =
  14. 14.Digital root of 88 × 49 =
  15. 15.Digital root of 85 × 54 =
  16. 16.Digital root of 89 × 14 =
  17. 17.Digital root of 30170 =
  18. 18.Digital root of 40155 =
  19. 19.Digital root of 11750 =
  20. 20.Digital root of 82486 =
  21. 21.Digital root of 72 × 72 =
  22. 22.Digital root of 50 × 64 =
  23. 23.Digital root of 36 × 79 =
  24. 24.Digital root of 42 × 25 =
  25. 25.Digital root of 11323 =
  26. 26.Digital root of 97 × 31 =
  27. 27.Digital root of 18 × 60 =
  28. 28.Digital root of 70 × 35 =
  29. 29.Digital root of 52 × 63 =
  30. 30.Digital root of 55 × 20 =
  31. 31.Digital root of 37100 =
  32. 32.Digital root of 78939 =
  33. 33.Digital root of 68 × 40 =
  34. 34.Digital root of 16 × 82 =
  35. 35.Digital root of 21458 =
  36. 36.Digital root of 55212 =
  37. 37.Digital root of 58369 =
  38. 38.Digital root of 18153 =
  39. 39.Digital root of 80294 =
  40. 40.Digital root of 67 × 37 =

Answer key

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

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