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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 883 · 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 25 × 41 =
  2. 2.Digital root of 86 × 33 =
  3. 3.Digital root of 36 × 52 =
  4. 4.Digital root of 58276 =
  5. 5.Digital root of 57002 =
  6. 6.Digital root of 40 × 45 =
  7. 7.Digital root of 40 × 48 =
  8. 8.Digital root of 52 × 20 =
  9. 9.Digital root of 82 × 84 =
  10. 10.Digital root of 47101 =
  11. 11.Digital root of 47 × 57 =
  12. 12.Digital root of 89 × 38 =
  13. 13.Digital root of 29 × 18 =
  14. 14.Digital root of 40135 =
  15. 15.Digital root of 2371 =
  16. 16.Digital root of 72 × 21 =
  17. 17.Digital root of 27 × 68 =
  18. 18.Digital root of 64 × 81 =
  19. 19.Digital root of 92 × 36 =
  20. 20.Digital root of 30 × 82 =
  21. 21.Digital root of 37 × 69 =
  22. 22.Digital root of 37 × 26 =
  23. 23.Digital root of 25 × 77 =
  24. 24.Digital root of 54471 =
  25. 25.Digital root of 20 × 26 =
  26. 26.Digital root of 27 × 83 =
  27. 27.Digital root of 6645 =
  28. 28.Digital root of 48658 =
  29. 29.Digital root of 9870 =
  30. 30.Digital root of 28 × 37 =
  31. 31.Digital root of 99010 =
  32. 32.Digital root of 60407 =
  33. 33.Digital root of 33631 =
  34. 34.Digital root of 89029 =
  35. 35.Digital root of 16 × 85 =
  36. 36.Digital root of 43 × 42 =
  37. 37.Digital root of 17 × 55 =
  38. 38.Digital root of 19352 =
  39. 39.Digital root of 25 × 37 =
  40. 40.Digital root of 76962 =

Answer key

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

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