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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 311 · 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 67 × 79 =
  2. 2.Digital root of 22 × 27 =
  3. 3.Digital root of 36 × 21 =
  4. 4.Digital root of 19132 =
  5. 5.Digital root of 62423 =
  6. 6.Digital root of 36325 =
  7. 7.Digital root of 47 × 68 =
  8. 8.Digital root of 52 × 24 =
  9. 9.Digital root of 86 × 71 =
  10. 10.Digital root of 22927 =
  11. 11.Digital root of 47229 =
  12. 12.Digital root of 8836 =
  13. 13.Digital root of 60 × 69 =
  14. 14.Digital root of 82489 =
  15. 15.Digital root of 48136 =
  16. 16.Digital root of 95 × 21 =
  17. 17.Digital root of 6927 =
  18. 18.Digital root of 89568 =
  19. 19.Digital root of 71533 =
  20. 20.Digital root of 62 × 25 =
  21. 21.Digital root of 15 × 26 =
  22. 22.Digital root of 25855 =
  23. 23.Digital root of 84547 =
  24. 24.Digital root of 16681 =
  25. 25.Digital root of 26925 =
  26. 26.Digital root of 22661 =
  27. 27.Digital root of 21147 =
  28. 28.Digital root of 4048 =
  29. 29.Digital root of 95 × 64 =
  30. 30.Digital root of 60962 =
  31. 31.Digital root of 67 × 65 =
  32. 32.Digital root of 45 × 80 =
  33. 33.Digital root of 78521 =
  34. 34.Digital root of 45862 =
  35. 35.Digital root of 43540 =
  36. 36.Digital root of 6668 =
  37. 37.Digital root of 87 × 79 =
  38. 38.Digital root of 16177 =
  39. 39.Digital root of 29598 =
  40. 40.Digital root of 23 × 32 =

Answer key

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

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