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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 240 · 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 65 × 67 =
  2. 2.Digital root of 37 × 13 =
  3. 3.Digital root of 56270 =
  4. 4.Digital root of 52 × 90 =
  5. 5.Digital root of 95 × 72 =
  6. 6.Digital root of 56 × 69 =
  7. 7.Digital root of 8940 =
  8. 8.Digital root of 27045 =
  9. 9.Digital root of 45262 =
  10. 10.Digital root of 80 × 18 =
  11. 11.Digital root of 54702 =
  12. 12.Digital root of 32 × 33 =
  13. 13.Digital root of 85 × 73 =
  14. 14.Digital root of 35 × 76 =
  15. 15.Digital root of 71657 =
  16. 16.Digital root of 21 × 48 =
  17. 17.Digital root of 49419 =
  18. 18.Digital root of 10749 =
  19. 19.Digital root of 29 × 21 =
  20. 20.Digital root of 74000 =
  21. 21.Digital root of 20720 =
  22. 22.Digital root of 9757 =
  23. 23.Digital root of 36004 =
  24. 24.Digital root of 17931 =
  25. 25.Digital root of 92 × 65 =
  26. 26.Digital root of 22 × 64 =
  27. 27.Digital root of 37 × 86 =
  28. 28.Digital root of 38 × 96 =
  29. 29.Digital root of 88074 =
  30. 30.Digital root of 67992 =
  31. 31.Digital root of 18 × 72 =
  32. 32.Digital root of 28 × 89 =
  33. 33.Digital root of 77 × 80 =
  34. 34.Digital root of 99 × 71 =
  35. 35.Digital root of 67151 =
  36. 36.Digital root of 16640 =
  37. 37.Digital root of 96740 =
  38. 38.Digital root of 71179 =
  39. 39.Digital root of 41 × 57 =
  40. 40.Digital root of 61 × 96 =

Answer key

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

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