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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 158 · 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 98446 =
  2. 2.Digital root of 97 × 79 =
  3. 3.Digital root of 34 × 83 =
  4. 4.Digital root of 59548 =
  5. 5.Digital root of 24456 =
  6. 6.Digital root of 63 × 92 =
  7. 7.Digital root of 94 × 72 =
  8. 8.Digital root of 90509 =
  9. 9.Digital root of 21400 =
  10. 10.Digital root of 7208 =
  11. 11.Digital root of 24494 =
  12. 12.Digital root of 19543 =
  13. 13.Digital root of 49 × 55 =
  14. 14.Digital root of 25 × 20 =
  15. 15.Digital root of 60 × 58 =
  16. 16.Digital root of 70117 =
  17. 17.Digital root of 38 × 85 =
  18. 18.Digital root of 73723 =
  19. 19.Digital root of 77 × 83 =
  20. 20.Digital root of 83811 =
  21. 21.Digital root of 29 × 94 =
  22. 22.Digital root of 51 × 52 =
  23. 23.Digital root of 66675 =
  24. 24.Digital root of 41 × 61 =
  25. 25.Digital root of 30509 =
  26. 26.Digital root of 82856 =
  27. 27.Digital root of 72658 =
  28. 28.Digital root of 51 × 37 =
  29. 29.Digital root of 66 × 79 =
  30. 30.Digital root of 32 × 12 =
  31. 31.Digital root of 38 × 13 =
  32. 32.Digital root of 88 × 58 =
  33. 33.Digital root of 64 × 20 =
  34. 34.Digital root of 22 × 23 =
  35. 35.Digital root of 96930 =
  36. 36.Digital root of 65 × 30 =
  37. 37.Digital root of 22138 =
  38. 38.Digital root of 56550 =
  39. 39.Digital root of 27 × 26 =
  40. 40.Digital root of 90524 =

Answer key

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

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