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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 698 · 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 9439 =
  2. 2.Digital root of 93506 =
  3. 3.Digital root of 16 × 99 =
  4. 4.Digital root of 77 × 66 =
  5. 5.Digital root of 38 × 56 =
  6. 6.Digital root of 17719 =
  7. 7.Digital root of 55 × 81 =
  8. 8.Digital root of 26 × 53 =
  9. 9.Digital root of 13 × 99 =
  10. 10.Digital root of 81489 =
  11. 11.Digital root of 89 × 77 =
  12. 12.Digital root of 30800 =
  13. 13.Digital root of 13 × 68 =
  14. 14.Digital root of 68 × 98 =
  15. 15.Digital root of 81435 =
  16. 16.Digital root of 23 × 75 =
  17. 17.Digital root of 92 × 26 =
  18. 18.Digital root of 39403 =
  19. 19.Digital root of 80 × 22 =
  20. 20.Digital root of 79786 =
  21. 21.Digital root of 52801 =
  22. 22.Digital root of 56 × 78 =
  23. 23.Digital root of 45563 =
  24. 24.Digital root of 38 × 16 =
  25. 25.Digital root of 82 × 46 =
  26. 26.Digital root of 42 × 14 =
  27. 27.Digital root of 54460 =
  28. 28.Digital root of 57 × 18 =
  29. 29.Digital root of 7065 =
  30. 30.Digital root of 61 × 86 =
  31. 31.Digital root of 47307 =
  32. 32.Digital root of 19553 =
  33. 33.Digital root of 35 × 65 =
  34. 34.Digital root of 11108 =
  35. 35.Digital root of 4323 =
  36. 36.Digital root of 69 × 89 =
  37. 37.Digital root of 28 × 63 =
  38. 38.Digital root of 35562 =
  39. 39.Digital root of 29488 =
  40. 40.Digital root of 71 × 68 =

Answer key

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

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