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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 709 · 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 74 × 55 =
  2. 2.Digital root of 33 × 74 =
  3. 3.Digital root of 33823 =
  4. 4.Digital root of 34 × 82 =
  5. 5.Digital root of 28 × 61 =
  6. 6.Digital root of 64095 =
  7. 7.Digital root of 44 × 65 =
  8. 8.Digital root of 58 × 16 =
  9. 9.Digital root of 59962 =
  10. 10.Digital root of 80269 =
  11. 11.Digital root of 77104 =
  12. 12.Digital root of 73307 =
  13. 13.Digital root of 72 × 85 =
  14. 14.Digital root of 78105 =
  15. 15.Digital root of 14 × 46 =
  16. 16.Digital root of 61 × 97 =
  17. 17.Digital root of 66087 =
  18. 18.Digital root of 22 × 73 =
  19. 19.Digital root of 17 × 65 =
  20. 20.Digital root of 25143 =
  21. 21.Digital root of 41 × 14 =
  22. 22.Digital root of 18540 =
  23. 23.Digital root of 11156 =
  24. 24.Digital root of 69 × 21 =
  25. 25.Digital root of 66572 =
  26. 26.Digital root of 48848 =
  27. 27.Digital root of 14575 =
  28. 28.Digital root of 36285 =
  29. 29.Digital root of 52249 =
  30. 30.Digital root of 91 × 50 =
  31. 31.Digital root of 27021 =
  32. 32.Digital root of 42699 =
  33. 33.Digital root of 92821 =
  34. 34.Digital root of 70 × 58 =
  35. 35.Digital root of 91 × 26 =
  36. 36.Digital root of 54058 =
  37. 37.Digital root of 73 × 92 =
  38. 38.Digital root of 71 × 49 =
  39. 39.Digital root of 43616 =
  40. 40.Digital root of 19 × 98 =

Answer key

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

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