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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 345 · 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 55 × 98 =
  2. 2.Digital root of 24 × 19 =
  3. 3.Digital root of 18237 =
  4. 4.Digital root of 94692 =
  5. 5.Digital root of 33237 =
  6. 6.Digital root of 17 × 83 =
  7. 7.Digital root of 24 × 16 =
  8. 8.Digital root of 93956 =
  9. 9.Digital root of 87 × 47 =
  10. 10.Digital root of 56 × 67 =
  11. 11.Digital root of 875 =
  12. 12.Digital root of 36030 =
  13. 13.Digital root of 79751 =
  14. 14.Digital root of 14 × 87 =
  15. 15.Digital root of 92 × 37 =
  16. 16.Digital root of 9957 =
  17. 17.Digital root of 936 =
  18. 18.Digital root of 86108 =
  19. 19.Digital root of 20 × 16 =
  20. 20.Digital root of 85937 =
  21. 21.Digital root of 20 × 33 =
  22. 22.Digital root of 17 × 86 =
  23. 23.Digital root of 75 × 91 =
  24. 24.Digital root of 67186 =
  25. 25.Digital root of 54316 =
  26. 26.Digital root of 41 × 35 =
  27. 27.Digital root of 36982 =
  28. 28.Digital root of 54291 =
  29. 29.Digital root of 99047 =
  30. 30.Digital root of 12 × 20 =
  31. 31.Digital root of 91 × 86 =
  32. 32.Digital root of 82 × 42 =
  33. 33.Digital root of 10151 =
  34. 34.Digital root of 68 × 43 =
  35. 35.Digital root of 33777 =
  36. 36.Digital root of 23867 =
  37. 37.Digital root of 35 × 55 =
  38. 38.Digital root of 69944 =
  39. 39.Digital root of 28620 =
  40. 40.Digital root of 78 × 15 =

Answer key

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

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