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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 105 · 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 39 × 45 =
  2. 2.Digital root of 79390 =
  3. 3.Digital root of 36862 =
  4. 4.Digital root of 33 × 94 =
  5. 5.Digital root of 33 × 40 =
  6. 6.Digital root of 49689 =
  7. 7.Digital root of 16 × 86 =
  8. 8.Digital root of 94344 =
  9. 9.Digital root of 91786 =
  10. 10.Digital root of 5179 =
  11. 11.Digital root of 3182 =
  12. 12.Digital root of 65 × 59 =
  13. 13.Digital root of 56 × 74 =
  14. 14.Digital root of 72624 =
  15. 15.Digital root of 18 × 83 =
  16. 16.Digital root of 17 × 17 =
  17. 17.Digital root of 63 × 57 =
  18. 18.Digital root of 25 × 67 =
  19. 19.Digital root of 48848 =
  20. 20.Digital root of 38261 =
  21. 21.Digital root of 68 × 32 =
  22. 22.Digital root of 18 × 22 =
  23. 23.Digital root of 20013 =
  24. 24.Digital root of 47905 =
  25. 25.Digital root of 73399 =
  26. 26.Digital root of 67 × 23 =
  27. 27.Digital root of 1956 =
  28. 28.Digital root of 99899 =
  29. 29.Digital root of 87369 =
  30. 30.Digital root of 19 × 20 =
  31. 31.Digital root of 73808 =
  32. 32.Digital root of 73 × 46 =
  33. 33.Digital root of 51 × 27 =
  34. 34.Digital root of 20 × 88 =
  35. 35.Digital root of 32011 =
  36. 36.Digital root of 75683 =
  37. 37.Digital root of 1450 =
  38. 38.Digital root of 39003 =
  39. 39.Digital root of 64 × 45 =
  40. 40.Digital root of 15 × 43 =

Answer key

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

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