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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 809 · 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 89 × 38 =
  2. 2.Digital root of 93 × 51 =
  3. 3.Digital root of 19 × 37 =
  4. 4.Digital root of 24 × 26 =
  5. 5.Digital root of 93515 =
  6. 6.Digital root of 29 × 26 =
  7. 7.Digital root of 81 × 70 =
  8. 8.Digital root of 42 × 52 =
  9. 9.Digital root of 20400 =
  10. 10.Digital root of 69563 =
  11. 11.Digital root of 39 × 37 =
  12. 12.Digital root of 13890 =
  13. 13.Digital root of 52 × 62 =
  14. 14.Digital root of 66 × 16 =
  15. 15.Digital root of 35668 =
  16. 16.Digital root of 27 × 27 =
  17. 17.Digital root of 24 × 47 =
  18. 18.Digital root of 12716 =
  19. 19.Digital root of 71207 =
  20. 20.Digital root of 86823 =
  21. 21.Digital root of 67126 =
  22. 22.Digital root of 38704 =
  23. 23.Digital root of 34565 =
  24. 24.Digital root of 54 × 43 =
  25. 25.Digital root of 21 × 66 =
  26. 26.Digital root of 42927 =
  27. 27.Digital root of 55049 =
  28. 28.Digital root of 39 × 50 =
  29. 29.Digital root of 94 × 86 =
  30. 30.Digital root of 43 × 87 =
  31. 31.Digital root of 35313 =
  32. 32.Digital root of 2305 =
  33. 33.Digital root of 70218 =
  34. 34.Digital root of 40 × 26 =
  35. 35.Digital root of 18 × 80 =
  36. 36.Digital root of 18814 =
  37. 37.Digital root of 11239 =
  38. 38.Digital root of 86 × 42 =
  39. 39.Digital root of 74966 =
  40. 40.Digital root of 24 × 47 =

Answer key

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

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