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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 713 · 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 10128 =
  2. 2.Digital root of 19 × 41 =
  3. 3.Digital root of 78 × 67 =
  4. 4.Digital root of 94 × 40 =
  5. 5.Digital root of 70305 =
  6. 6.Digital root of 87479 =
  7. 7.Digital root of 85584 =
  8. 8.Digital root of 63 × 89 =
  9. 9.Digital root of 21787 =
  10. 10.Digital root of 74 × 12 =
  11. 11.Digital root of 51 × 64 =
  12. 12.Digital root of 87939 =
  13. 13.Digital root of 17 × 88 =
  14. 14.Digital root of 92045 =
  15. 15.Digital root of 43446 =
  16. 16.Digital root of 73305 =
  17. 17.Digital root of 17 × 88 =
  18. 18.Digital root of 81 × 63 =
  19. 19.Digital root of 95070 =
  20. 20.Digital root of 12355 =
  21. 21.Digital root of 88375 =
  22. 22.Digital root of 34 × 97 =
  23. 23.Digital root of 73372 =
  24. 24.Digital root of 60832 =
  25. 25.Digital root of 52 × 42 =
  26. 26.Digital root of 69043 =
  27. 27.Digital root of 87590 =
  28. 28.Digital root of 75 × 26 =
  29. 29.Digital root of 50 × 34 =
  30. 30.Digital root of 65 × 41 =
  31. 31.Digital root of 4200 =
  32. 32.Digital root of 3703 =
  33. 33.Digital root of 35128 =
  34. 34.Digital root of 70498 =
  35. 35.Digital root of 83323 =
  36. 36.Digital root of 64 × 43 =
  37. 37.Digital root of 91255 =
  38. 38.Digital root of 75405 =
  39. 39.Digital root of 22 × 40 =
  40. 40.Digital root of 217 =

Answer key

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

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