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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 408 · 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 13 × 55 =
  2. 2.Digital root of 32 × 52 =
  3. 3.Digital root of 80 × 78 =
  4. 4.Digital root of 70 × 77 =
  5. 5.Digital root of 26800 =
  6. 6.Digital root of 93 × 12 =
  7. 7.Digital root of 39 × 64 =
  8. 8.Digital root of 23075 =
  9. 9.Digital root of 42400 =
  10. 10.Digital root of 91 × 75 =
  11. 11.Digital root of 75 × 67 =
  12. 12.Digital root of 91507 =
  13. 13.Digital root of 97172 =
  14. 14.Digital root of 55 × 14 =
  15. 15.Digital root of 56858 =
  16. 16.Digital root of 43895 =
  17. 17.Digital root of 89781 =
  18. 18.Digital root of 44919 =
  19. 19.Digital root of 29289 =
  20. 20.Digital root of 73 × 57 =
  21. 21.Digital root of 65 × 35 =
  22. 22.Digital root of 90 × 29 =
  23. 23.Digital root of 36 × 79 =
  24. 24.Digital root of 45 × 36 =
  25. 25.Digital root of 63 × 19 =
  26. 26.Digital root of 84 × 33 =
  27. 27.Digital root of 33 × 56 =
  28. 28.Digital root of 47 × 47 =
  29. 29.Digital root of 72136 =
  30. 30.Digital root of 86 × 42 =
  31. 31.Digital root of 39 × 20 =
  32. 32.Digital root of 82 × 19 =
  33. 33.Digital root of 23978 =
  34. 34.Digital root of 81030 =
  35. 35.Digital root of 24494 =
  36. 36.Digital root of 93 × 27 =
  37. 37.Digital root of 86327 =
  38. 38.Digital root of 16 × 68 =
  39. 39.Digital root of 87505 =
  40. 40.Digital root of 72720 =

Answer key

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

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