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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 841 · 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 27997 =
  2. 2.Digital root of 74 × 31 =
  3. 3.Digital root of 4151 =
  4. 4.Digital root of 50872 =
  5. 5.Digital root of 32 × 85 =
  6. 6.Digital root of 79479 =
  7. 7.Digital root of 17 × 90 =
  8. 8.Digital root of 9970 =
  9. 9.Digital root of 57 × 54 =
  10. 10.Digital root of 91328 =
  11. 11.Digital root of 35 × 81 =
  12. 12.Digital root of 17433 =
  13. 13.Digital root of 26 × 66 =
  14. 14.Digital root of 47773 =
  15. 15.Digital root of 89 × 94 =
  16. 16.Digital root of 91666 =
  17. 17.Digital root of 89 × 88 =
  18. 18.Digital root of 83 × 36 =
  19. 19.Digital root of 84266 =
  20. 20.Digital root of 42 × 82 =
  21. 21.Digital root of 43992 =
  22. 22.Digital root of 71 × 62 =
  23. 23.Digital root of 76 × 99 =
  24. 24.Digital root of 73 × 23 =
  25. 25.Digital root of 53 × 35 =
  26. 26.Digital root of 70 × 18 =
  27. 27.Digital root of 65 × 41 =
  28. 28.Digital root of 8972 =
  29. 29.Digital root of 67177 =
  30. 30.Digital root of 56986 =
  31. 31.Digital root of 86 × 73 =
  32. 32.Digital root of 67030 =
  33. 33.Digital root of 21510 =
  34. 34.Digital root of 12 × 52 =
  35. 35.Digital root of 37226 =
  36. 36.Digital root of 51408 =
  37. 37.Digital root of 39380 =
  38. 38.Digital root of 11604 =
  39. 39.Digital root of 35153 =
  40. 40.Digital root of 59018 =

Answer key

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

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