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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 160 · 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 42363 =
  2. 2.Digital root of 88 × 37 =
  3. 3.Digital root of 59 × 55 =
  4. 4.Digital root of 19 × 63 =
  5. 5.Digital root of 51 × 19 =
  6. 6.Digital root of 17832 =
  7. 7.Digital root of 65287 =
  8. 8.Digital root of 80 × 30 =
  9. 9.Digital root of 75 × 51 =
  10. 10.Digital root of 19 × 53 =
  11. 11.Digital root of 52221 =
  12. 12.Digital root of 14246 =
  13. 13.Digital root of 98 × 71 =
  14. 14.Digital root of 85 × 25 =
  15. 15.Digital root of 12 × 60 =
  16. 16.Digital root of 40 × 52 =
  17. 17.Digital root of 45 × 44 =
  18. 18.Digital root of 45 × 42 =
  19. 19.Digital root of 48 × 38 =
  20. 20.Digital root of 36 × 82 =
  21. 21.Digital root of 96164 =
  22. 22.Digital root of 74301 =
  23. 23.Digital root of 14 × 95 =
  24. 24.Digital root of 41 × 94 =
  25. 25.Digital root of 83418 =
  26. 26.Digital root of 23693 =
  27. 27.Digital root of 83622 =
  28. 28.Digital root of 43 × 64 =
  29. 29.Digital root of 48 × 18 =
  30. 30.Digital root of 93123 =
  31. 31.Digital root of 28340 =
  32. 32.Digital root of 7828 =
  33. 33.Digital root of 94138 =
  34. 34.Digital root of 47007 =
  35. 35.Digital root of 28 × 82 =
  36. 36.Digital root of 42 × 25 =
  37. 37.Digital root of 71 × 54 =
  38. 38.Digital root of 76129 =
  39. 39.Digital root of 38389 =
  40. 40.Digital root of 18 × 38 =

Answer key

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

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