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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 733 · 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 20 × 29 =
  2. 2.Digital root of 10656 =
  3. 3.Digital root of 79 × 15 =
  4. 4.Digital root of 83 × 44 =
  5. 5.Digital root of 23 × 16 =
  6. 6.Digital root of 7248 =
  7. 7.Digital root of 31 × 88 =
  8. 8.Digital root of 47980 =
  9. 9.Digital root of 70 × 96 =
  10. 10.Digital root of 49 × 66 =
  11. 11.Digital root of 40975 =
  12. 12.Digital root of 68 × 34 =
  13. 13.Digital root of 27 × 88 =
  14. 14.Digital root of 87980 =
  15. 15.Digital root of 98640 =
  16. 16.Digital root of 72 × 96 =
  17. 17.Digital root of 99 × 36 =
  18. 18.Digital root of 51 × 47 =
  19. 19.Digital root of 76 × 48 =
  20. 20.Digital root of 81666 =
  21. 21.Digital root of 15 × 25 =
  22. 22.Digital root of 36 × 39 =
  23. 23.Digital root of 26 × 64 =
  24. 24.Digital root of 35 × 49 =
  25. 25.Digital root of 79 × 25 =
  26. 26.Digital root of 35 × 13 =
  27. 27.Digital root of 82112 =
  28. 28.Digital root of 25 × 33 =
  29. 29.Digital root of 56424 =
  30. 30.Digital root of 47763 =
  31. 31.Digital root of 76 × 39 =
  32. 32.Digital root of 10988 =
  33. 33.Digital root of 28487 =
  34. 34.Digital root of 84 × 74 =
  35. 35.Digital root of 53 × 57 =
  36. 36.Digital root of 14 × 39 =
  37. 37.Digital root of 29 × 18 =
  38. 38.Digital root of 17 × 63 =
  39. 39.Digital root of 96 × 82 =
  40. 40.Digital root of 29 × 29 =

Answer key

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

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