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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 277 · 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 45 × 97 =
  2. 2.Digital root of 13 × 99 =
  3. 3.Digital root of 96 × 34 =
  4. 4.Digital root of 90374 =
  5. 5.Digital root of 92512 =
  6. 6.Digital root of 26773 =
  7. 7.Digital root of 27 × 40 =
  8. 8.Digital root of 49 × 98 =
  9. 9.Digital root of 43834 =
  10. 10.Digital root of 64032 =
  11. 11.Digital root of 42 × 37 =
  12. 12.Digital root of 67 × 83 =
  13. 13.Digital root of 52164 =
  14. 14.Digital root of 60755 =
  15. 15.Digital root of 14 × 65 =
  16. 16.Digital root of 87312 =
  17. 17.Digital root of 93836 =
  18. 18.Digital root of 66301 =
  19. 19.Digital root of 54 × 69 =
  20. 20.Digital root of 98 × 41 =
  21. 21.Digital root of 27 × 88 =
  22. 22.Digital root of 57 × 75 =
  23. 23.Digital root of 99 × 74 =
  24. 24.Digital root of 97 × 57 =
  25. 25.Digital root of 59 × 47 =
  26. 26.Digital root of 73 × 83 =
  27. 27.Digital root of 61 × 73 =
  28. 28.Digital root of 98170 =
  29. 29.Digital root of 52233 =
  30. 30.Digital root of 246 =
  31. 31.Digital root of 93682 =
  32. 32.Digital root of 99503 =
  33. 33.Digital root of 68 × 86 =
  34. 34.Digital root of 52380 =
  35. 35.Digital root of 38 × 90 =
  36. 36.Digital root of 11214 =
  37. 37.Digital root of 55 × 72 =
  38. 38.Digital root of 46284 =
  39. 39.Digital root of 23 × 74 =
  40. 40.Digital root of 98 × 46 =

Answer key

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

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