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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 519 · 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 4822 =
  2. 2.Digital root of 29 × 89 =
  3. 3.Digital root of 91 × 16 =
  4. 4.Digital root of 85650 =
  5. 5.Digital root of 23 × 73 =
  6. 6.Digital root of 76066 =
  7. 7.Digital root of 75 × 15 =
  8. 8.Digital root of 33 × 58 =
  9. 9.Digital root of 65531 =
  10. 10.Digital root of 72 × 33 =
  11. 11.Digital root of 29 × 16 =
  12. 12.Digital root of 79 × 97 =
  13. 13.Digital root of 11700 =
  14. 14.Digital root of 90 × 95 =
  15. 15.Digital root of 5514 =
  16. 16.Digital root of 98 × 79 =
  17. 17.Digital root of 86 × 51 =
  18. 18.Digital root of 66 × 39 =
  19. 19.Digital root of 5065 =
  20. 20.Digital root of 22811 =
  21. 21.Digital root of 26153 =
  22. 22.Digital root of 31 × 81 =
  23. 23.Digital root of 94 × 88 =
  24. 24.Digital root of 22690 =
  25. 25.Digital root of 20 × 31 =
  26. 26.Digital root of 68 × 18 =
  27. 27.Digital root of 92 × 19 =
  28. 28.Digital root of 81298 =
  29. 29.Digital root of 99355 =
  30. 30.Digital root of 97 × 24 =
  31. 31.Digital root of 26 × 68 =
  32. 32.Digital root of 1568 =
  33. 33.Digital root of 58 × 75 =
  34. 34.Digital root of 26509 =
  35. 35.Digital root of 96522 =
  36. 36.Digital root of 25970 =
  37. 37.Digital root of 93168 =
  38. 38.Digital root of 25 × 22 =
  39. 39.Digital root of 21 × 94 =
  40. 40.Digital root of 92 × 65 =

Answer key

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

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