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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 779 · 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 47 × 15 =
  2. 2.Digital root of 16 × 30 =
  3. 3.Digital root of 36043 =
  4. 4.Digital root of 30444 =
  5. 5.Digital root of 47 × 33 =
  6. 6.Digital root of 21 × 56 =
  7. 7.Digital root of 34 × 79 =
  8. 8.Digital root of 50342 =
  9. 9.Digital root of 17 × 64 =
  10. 10.Digital root of 62307 =
  11. 11.Digital root of 34863 =
  12. 12.Digital root of 72860 =
  13. 13.Digital root of 82406 =
  14. 14.Digital root of 10664 =
  15. 15.Digital root of 25121 =
  16. 16.Digital root of 71 × 82 =
  17. 17.Digital root of 26026 =
  18. 18.Digital root of 636 =
  19. 19.Digital root of 21279 =
  20. 20.Digital root of 68174 =
  21. 21.Digital root of 44780 =
  22. 22.Digital root of 4067 =
  23. 23.Digital root of 19 × 38 =
  24. 24.Digital root of 87 × 16 =
  25. 25.Digital root of 85 × 19 =
  26. 26.Digital root of 40516 =
  27. 27.Digital root of 58606 =
  28. 28.Digital root of 57 × 30 =
  29. 29.Digital root of 98 × 80 =
  30. 30.Digital root of 70155 =
  31. 31.Digital root of 81895 =
  32. 32.Digital root of 21 × 96 =
  33. 33.Digital root of 48239 =
  34. 34.Digital root of 70 × 90 =
  35. 35.Digital root of 13880 =
  36. 36.Digital root of 75 × 65 =
  37. 37.Digital root of 6306 =
  38. 38.Digital root of 31 × 20 =
  39. 39.Digital root of 2820 =
  40. 40.Digital root of 51 × 67 =

Answer key

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

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