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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 696 · 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 57 × 80 =
  2. 2.Digital root of 6769 =
  3. 3.Digital root of 14 × 99 =
  4. 4.Digital root of 59151 =
  5. 5.Digital root of 71 × 41 =
  6. 6.Digital root of 71 × 72 =
  7. 7.Digital root of 38 × 16 =
  8. 8.Digital root of 52 × 99 =
  9. 9.Digital root of 38 × 79 =
  10. 10.Digital root of 62007 =
  11. 11.Digital root of 45228 =
  12. 12.Digital root of 87230 =
  13. 13.Digital root of 8494 =
  14. 14.Digital root of 84 × 53 =
  15. 15.Digital root of 65 × 58 =
  16. 16.Digital root of 16512 =
  17. 17.Digital root of 9709 =
  18. 18.Digital root of 69468 =
  19. 19.Digital root of 89803 =
  20. 20.Digital root of 47 × 38 =
  21. 21.Digital root of 28922 =
  22. 22.Digital root of 26310 =
  23. 23.Digital root of 15 × 58 =
  24. 24.Digital root of 17 × 28 =
  25. 25.Digital root of 49282 =
  26. 26.Digital root of 15 × 13 =
  27. 27.Digital root of 63 × 82 =
  28. 28.Digital root of 67 × 39 =
  29. 29.Digital root of 48 × 37 =
  30. 30.Digital root of 12 × 63 =
  31. 31.Digital root of 46500 =
  32. 32.Digital root of 56 × 18 =
  33. 33.Digital root of 90658 =
  34. 34.Digital root of 67 × 88 =
  35. 35.Digital root of 38 × 16 =
  36. 36.Digital root of 97489 =
  37. 37.Digital root of 92 × 91 =
  38. 38.Digital root of 92405 =
  39. 39.Digital root of 67168 =
  40. 40.Digital root of 97 × 31 =

Answer key

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

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