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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 406 · 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 32 × 31 =
  2. 2.Digital root of 71143 =
  3. 3.Digital root of 12794 =
  4. 4.Digital root of 12 × 39 =
  5. 5.Digital root of 30778 =
  6. 6.Digital root of 73 × 99 =
  7. 7.Digital root of 26391 =
  8. 8.Digital root of 41072 =
  9. 9.Digital root of 21658 =
  10. 10.Digital root of 19454 =
  11. 11.Digital root of 75 × 50 =
  12. 12.Digital root of 27862 =
  13. 13.Digital root of 71 × 39 =
  14. 14.Digital root of 92 × 90 =
  15. 15.Digital root of 18012 =
  16. 16.Digital root of 19 × 40 =
  17. 17.Digital root of 96339 =
  18. 18.Digital root of 67 × 84 =
  19. 19.Digital root of 87 × 29 =
  20. 20.Digital root of 55 × 89 =
  21. 21.Digital root of 89 × 44 =
  22. 22.Digital root of 27 × 18 =
  23. 23.Digital root of 29 × 43 =
  24. 24.Digital root of 75712 =
  25. 25.Digital root of 86 × 86 =
  26. 26.Digital root of 42 × 35 =
  27. 27.Digital root of 75 × 67 =
  28. 28.Digital root of 20326 =
  29. 29.Digital root of 50 × 43 =
  30. 30.Digital root of 40840 =
  31. 31.Digital root of 65 × 23 =
  32. 32.Digital root of 68958 =
  33. 33.Digital root of 1317 =
  34. 34.Digital root of 63523 =
  35. 35.Digital root of 34 × 41 =
  36. 36.Digital root of 16061 =
  37. 37.Digital root of 59950 =
  38. 38.Digital root of 13 × 57 =
  39. 39.Digital root of 42114 =
  40. 40.Digital root of 57 × 16 =

Answer key

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

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