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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 642 · 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 76 × 80 =
  2. 2.Digital root of 87687 =
  3. 3.Digital root of 58903 =
  4. 4.Digital root of 60 × 34 =
  5. 5.Digital root of 79 × 51 =
  6. 6.Digital root of 87 × 31 =
  7. 7.Digital root of 85981 =
  8. 8.Digital root of 72 × 41 =
  9. 9.Digital root of 96 × 99 =
  10. 10.Digital root of 30 × 97 =
  11. 11.Digital root of 70 × 96 =
  12. 12.Digital root of 72 × 90 =
  13. 13.Digital root of 92 × 22 =
  14. 14.Digital root of 44171 =
  15. 15.Digital root of 23 × 64 =
  16. 16.Digital root of 31 × 54 =
  17. 17.Digital root of 62384 =
  18. 18.Digital root of 88 × 39 =
  19. 19.Digital root of 66364 =
  20. 20.Digital root of 52807 =
  21. 21.Digital root of 49254 =
  22. 22.Digital root of 540 =
  23. 23.Digital root of 15074 =
  24. 24.Digital root of 96313 =
  25. 25.Digital root of 74 × 65 =
  26. 26.Digital root of 43 × 38 =
  27. 27.Digital root of 79792 =
  28. 28.Digital root of 7604 =
  29. 29.Digital root of 90144 =
  30. 30.Digital root of 56 × 52 =
  31. 31.Digital root of 12876 =
  32. 32.Digital root of 90 × 71 =
  33. 33.Digital root of 23771 =
  34. 34.Digital root of 89 × 43 =
  35. 35.Digital root of 62868 =
  36. 36.Digital root of 2012 =
  37. 37.Digital root of 94360 =
  38. 38.Digital root of 15 × 34 =
  39. 39.Digital root of 86 × 99 =
  40. 40.Digital root of 20 × 24 =

Answer key

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

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