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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 164 · 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 51877 =
  2. 2.Digital root of 10334 =
  3. 3.Digital root of 73 × 64 =
  4. 4.Digital root of 79 × 13 =
  5. 5.Digital root of 7680 =
  6. 6.Digital root of 17769 =
  7. 7.Digital root of 91 × 48 =
  8. 8.Digital root of 25 × 77 =
  9. 9.Digital root of 14 × 88 =
  10. 10.Digital root of 63 × 47 =
  11. 11.Digital root of 57 × 87 =
  12. 12.Digital root of 66645 =
  13. 13.Digital root of 14 × 48 =
  14. 14.Digital root of 5542 =
  15. 15.Digital root of 25 × 54 =
  16. 16.Digital root of 93259 =
  17. 17.Digital root of 15 × 23 =
  18. 18.Digital root of 79 × 95 =
  19. 19.Digital root of 46 × 54 =
  20. 20.Digital root of 59002 =
  21. 21.Digital root of 83 × 18 =
  22. 22.Digital root of 3335 =
  23. 23.Digital root of 36807 =
  24. 24.Digital root of 67 × 94 =
  25. 25.Digital root of 29 × 49 =
  26. 26.Digital root of 16 × 90 =
  27. 27.Digital root of 1769 =
  28. 28.Digital root of 83580 =
  29. 29.Digital root of 75 × 46 =
  30. 30.Digital root of 83883 =
  31. 31.Digital root of 25 × 17 =
  32. 32.Digital root of 70947 =
  33. 33.Digital root of 61687 =
  34. 34.Digital root of 84133 =
  35. 35.Digital root of 52 × 17 =
  36. 36.Digital root of 94508 =
  37. 37.Digital root of 44 × 65 =
  38. 38.Digital root of 81 × 37 =
  39. 39.Digital root of 35987 =
  40. 40.Digital root of 97 × 41 =

Answer key

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

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