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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 954 · 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 87 × 99 =
  2. 2.Digital root of 12 × 63 =
  3. 3.Digital root of 93 × 41 =
  4. 4.Digital root of 96 × 18 =
  5. 5.Digital root of 20931 =
  6. 6.Digital root of 65474 =
  7. 7.Digital root of 61 × 64 =
  8. 8.Digital root of 12635 =
  9. 9.Digital root of 74 × 35 =
  10. 10.Digital root of 15 × 24 =
  11. 11.Digital root of 97461 =
  12. 12.Digital root of 2324 =
  13. 13.Digital root of 72172 =
  14. 14.Digital root of 99 × 22 =
  15. 15.Digital root of 33 × 28 =
  16. 16.Digital root of 78 × 79 =
  17. 17.Digital root of 5305 =
  18. 18.Digital root of 7615 =
  19. 19.Digital root of 40 × 13 =
  20. 20.Digital root of 28 × 92 =
  21. 21.Digital root of 59135 =
  22. 22.Digital root of 74 × 51 =
  23. 23.Digital root of 27711 =
  24. 24.Digital root of 11340 =
  25. 25.Digital root of 78 × 15 =
  26. 26.Digital root of 51775 =
  27. 27.Digital root of 69525 =
  28. 28.Digital root of 60 × 19 =
  29. 29.Digital root of 36891 =
  30. 30.Digital root of 25440 =
  31. 31.Digital root of 77 × 15 =
  32. 32.Digital root of 26879 =
  33. 33.Digital root of 39601 =
  34. 34.Digital root of 16477 =
  35. 35.Digital root of 23 × 30 =
  36. 36.Digital root of 70 × 35 =
  37. 37.Digital root of 61 × 89 =
  38. 38.Digital root of 86589 =
  39. 39.Digital root of 12922 =
  40. 40.Digital root of 34 × 57 =

Answer key

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

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