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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 231 · 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 79 × 20 =
  2. 2.Digital root of 23 × 16 =
  3. 3.Digital root of 56 × 74 =
  4. 4.Digital root of 65 × 88 =
  5. 5.Digital root of 63149 =
  6. 6.Digital root of 34254 =
  7. 7.Digital root of 83 × 53 =
  8. 8.Digital root of 20 × 31 =
  9. 9.Digital root of 62117 =
  10. 10.Digital root of 38 × 49 =
  11. 11.Digital root of 33 × 28 =
  12. 12.Digital root of 37330 =
  13. 13.Digital root of 69661 =
  14. 14.Digital root of 66 × 55 =
  15. 15.Digital root of 85516 =
  16. 16.Digital root of 95 × 19 =
  17. 17.Digital root of 23 × 36 =
  18. 18.Digital root of 67 × 80 =
  19. 19.Digital root of 13680 =
  20. 20.Digital root of 61 × 97 =
  21. 21.Digital root of 94155 =
  22. 22.Digital root of 71049 =
  23. 23.Digital root of 88973 =
  24. 24.Digital root of 92 × 59 =
  25. 25.Digital root of 63 × 45 =
  26. 26.Digital root of 14532 =
  27. 27.Digital root of 22418 =
  28. 28.Digital root of 51235 =
  29. 29.Digital root of 39 × 87 =
  30. 30.Digital root of 29835 =
  31. 31.Digital root of 16 × 50 =
  32. 32.Digital root of 26895 =
  33. 33.Digital root of 98227 =
  34. 34.Digital root of 76859 =
  35. 35.Digital root of 76 × 33 =
  36. 36.Digital root of 61687 =
  37. 37.Digital root of 88 × 66 =
  38. 38.Digital root of 21 × 19 =
  39. 39.Digital root of 46 × 48 =
  40. 40.Digital root of 47996 =

Answer key

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

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