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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 724 · 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 97 × 25 =
  2. 2.Digital root of 59 × 29 =
  3. 3.Digital root of 19 × 37 =
  4. 4.Digital root of 97 × 77 =
  5. 5.Digital root of 43242 =
  6. 6.Digital root of 98441 =
  7. 7.Digital root of 17 × 89 =
  8. 8.Digital root of 52573 =
  9. 9.Digital root of 94 × 15 =
  10. 10.Digital root of 72670 =
  11. 11.Digital root of 20276 =
  12. 12.Digital root of 14745 =
  13. 13.Digital root of 56 × 45 =
  14. 14.Digital root of 63 × 42 =
  15. 15.Digital root of 75956 =
  16. 16.Digital root of 89345 =
  17. 17.Digital root of 98105 =
  18. 18.Digital root of 42 × 98 =
  19. 19.Digital root of 89 × 21 =
  20. 20.Digital root of 83753 =
  21. 21.Digital root of 59 × 68 =
  22. 22.Digital root of 27706 =
  23. 23.Digital root of 46 × 24 =
  24. 24.Digital root of 31325 =
  25. 25.Digital root of 18621 =
  26. 26.Digital root of 85 × 16 =
  27. 27.Digital root of 26 × 14 =
  28. 28.Digital root of 66 × 86 =
  29. 29.Digital root of 48 × 39 =
  30. 30.Digital root of 42009 =
  31. 31.Digital root of 27 × 55 =
  32. 32.Digital root of 29 × 63 =
  33. 33.Digital root of 37 × 46 =
  34. 34.Digital root of 99826 =
  35. 35.Digital root of 9510 =
  36. 36.Digital root of 20 × 88 =
  37. 37.Digital root of 37 × 14 =
  38. 38.Digital root of 20168 =
  39. 39.Digital root of 32 × 14 =
  40. 40.Digital root of 4071 =

Answer key

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

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