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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 283 · 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 77 × 41 =
  2. 2.Digital root of 95 × 83 =
  3. 3.Digital root of 42706 =
  4. 4.Digital root of 35 × 16 =
  5. 5.Digital root of 3927 =
  6. 6.Digital root of 33 × 79 =
  7. 7.Digital root of 57 × 51 =
  8. 8.Digital root of 2400 =
  9. 9.Digital root of 85 × 13 =
  10. 10.Digital root of 12 × 23 =
  11. 11.Digital root of 64500 =
  12. 12.Digital root of 29 × 90 =
  13. 13.Digital root of 84952 =
  14. 14.Digital root of 14971 =
  15. 15.Digital root of 59 × 49 =
  16. 16.Digital root of 80362 =
  17. 17.Digital root of 71 × 39 =
  18. 18.Digital root of 74 × 98 =
  19. 19.Digital root of 62385 =
  20. 20.Digital root of 61 × 36 =
  21. 21.Digital root of 63626 =
  22. 22.Digital root of 27 × 80 =
  23. 23.Digital root of 32815 =
  24. 24.Digital root of 78901 =
  25. 25.Digital root of 39 × 47 =
  26. 26.Digital root of 59795 =
  27. 27.Digital root of 64 × 44 =
  28. 28.Digital root of 94480 =
  29. 29.Digital root of 86731 =
  30. 30.Digital root of 26 × 68 =
  31. 31.Digital root of 14 × 79 =
  32. 32.Digital root of 87 × 66 =
  33. 33.Digital root of 47514 =
  34. 34.Digital root of 52248 =
  35. 35.Digital root of 27139 =
  36. 36.Digital root of 20 × 53 =
  37. 37.Digital root of 33 × 35 =
  38. 38.Digital root of 51 × 84 =
  39. 39.Digital root of 39249 =
  40. 40.Digital root of 87 × 37 =

Answer key

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

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