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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 378 · 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 93 × 19 =
  2. 2.Digital root of 29 × 67 =
  3. 3.Digital root of 90 × 37 =
  4. 4.Digital root of 43 × 83 =
  5. 5.Digital root of 58 × 54 =
  6. 6.Digital root of 68 × 68 =
  7. 7.Digital root of 50632 =
  8. 8.Digital root of 74749 =
  9. 9.Digital root of 18971 =
  10. 10.Digital root of 18 × 38 =
  11. 11.Digital root of 34370 =
  12. 12.Digital root of 25 × 16 =
  13. 13.Digital root of 46704 =
  14. 14.Digital root of 13 × 93 =
  15. 15.Digital root of 27 × 29 =
  16. 16.Digital root of 48106 =
  17. 17.Digital root of 84573 =
  18. 18.Digital root of 26 × 17 =
  19. 19.Digital root of 73 × 87 =
  20. 20.Digital root of 13 × 42 =
  21. 21.Digital root of 46 × 91 =
  22. 22.Digital root of 50861 =
  23. 23.Digital root of 52792 =
  24. 24.Digital root of 68 × 25 =
  25. 25.Digital root of 69 × 89 =
  26. 26.Digital root of 77264 =
  27. 27.Digital root of 78545 =
  28. 28.Digital root of 86073 =
  29. 29.Digital root of 22472 =
  30. 30.Digital root of 99121 =
  31. 31.Digital root of 76 × 85 =
  32. 32.Digital root of 97 × 44 =
  33. 33.Digital root of 90497 =
  34. 34.Digital root of 21141 =
  35. 35.Digital root of 52 × 74 =
  36. 36.Digital root of 61 × 78 =
  37. 37.Digital root of 98 × 69 =
  38. 38.Digital root of 19 × 85 =
  39. 39.Digital root of 51263 =
  40. 40.Digital root of 75352 =

Answer key

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

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