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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 585 · 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 16 × 47 =
  2. 2.Digital root of 37 × 54 =
  3. 3.Digital root of 50 × 74 =
  4. 4.Digital root of 43 × 13 =
  5. 5.Digital root of 15228 =
  6. 6.Digital root of 39 × 48 =
  7. 7.Digital root of 52 × 23 =
  8. 8.Digital root of 94080 =
  9. 9.Digital root of 56 × 78 =
  10. 10.Digital root of 52306 =
  11. 11.Digital root of 48 × 24 =
  12. 12.Digital root of 47 × 61 =
  13. 13.Digital root of 4456 =
  14. 14.Digital root of 71 × 82 =
  15. 15.Digital root of 42 × 92 =
  16. 16.Digital root of 56580 =
  17. 17.Digital root of 35 × 47 =
  18. 18.Digital root of 58 × 59 =
  19. 19.Digital root of 56 × 44 =
  20. 20.Digital root of 4612 =
  21. 21.Digital root of 81 × 45 =
  22. 22.Digital root of 75 × 78 =
  23. 23.Digital root of 61 × 48 =
  24. 24.Digital root of 21035 =
  25. 25.Digital root of 12 × 12 =
  26. 26.Digital root of 44 × 37 =
  27. 27.Digital root of 81 × 77 =
  28. 28.Digital root of 19508 =
  29. 29.Digital root of 86628 =
  30. 30.Digital root of 60 × 62 =
  31. 31.Digital root of 7565 =
  32. 32.Digital root of 21 × 17 =
  33. 33.Digital root of 30964 =
  34. 34.Digital root of 23 × 35 =
  35. 35.Digital root of 17496 =
  36. 36.Digital root of 94031 =
  37. 37.Digital root of 13 × 32 =
  38. 38.Digital root of 70028 =
  39. 39.Digital root of 93 × 15 =
  40. 40.Digital root of 12 × 14 =

Answer key

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

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