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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 331 · 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 51037 =
  2. 2.Digital root of 53707 =
  3. 3.Digital root of 92 × 17 =
  4. 4.Digital root of 80 × 26 =
  5. 5.Digital root of 59 × 32 =
  6. 6.Digital root of 25037 =
  7. 7.Digital root of 97 × 13 =
  8. 8.Digital root of 77 × 90 =
  9. 9.Digital root of 73599 =
  10. 10.Digital root of 97502 =
  11. 11.Digital root of 30 × 31 =
  12. 12.Digital root of 2155 =
  13. 13.Digital root of 68 × 48 =
  14. 14.Digital root of 55818 =
  15. 15.Digital root of 12 × 19 =
  16. 16.Digital root of 62910 =
  17. 17.Digital root of 30154 =
  18. 18.Digital root of 55 × 81 =
  19. 19.Digital root of 65 × 27 =
  20. 20.Digital root of 73217 =
  21. 21.Digital root of 20 × 99 =
  22. 22.Digital root of 99132 =
  23. 23.Digital root of 19 × 14 =
  24. 24.Digital root of 49 × 42 =
  25. 25.Digital root of 64 × 82 =
  26. 26.Digital root of 69 × 36 =
  27. 27.Digital root of 35 × 59 =
  28. 28.Digital root of 20 × 25 =
  29. 29.Digital root of 17 × 49 =
  30. 30.Digital root of 25 × 33 =
  31. 31.Digital root of 82179 =
  32. 32.Digital root of 76462 =
  33. 33.Digital root of 7064 =
  34. 34.Digital root of 50378 =
  35. 35.Digital root of 65 × 56 =
  36. 36.Digital root of 40033 =
  37. 37.Digital root of 12 × 68 =
  38. 38.Digital root of 4438 =
  39. 39.Digital root of 89956 =
  40. 40.Digital root of 70142 =

Answer key

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

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