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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 285 · 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 78 × 21 =
  2. 2.Digital root of 58 × 44 =
  3. 3.Digital root of 42589 =
  4. 4.Digital root of 80 × 41 =
  5. 5.Digital root of 33 × 66 =
  6. 6.Digital root of 39 × 85 =
  7. 7.Digital root of 34898 =
  8. 8.Digital root of 326 =
  9. 9.Digital root of 29180 =
  10. 10.Digital root of 21 × 34 =
  11. 11.Digital root of 73 × 97 =
  12. 12.Digital root of 16481 =
  13. 13.Digital root of 80635 =
  14. 14.Digital root of 62 × 51 =
  15. 15.Digital root of 70 × 36 =
  16. 16.Digital root of 45 × 24 =
  17. 17.Digital root of 16453 =
  18. 18.Digital root of 46082 =
  19. 19.Digital root of 78 × 35 =
  20. 20.Digital root of 98 × 62 =
  21. 21.Digital root of 25 × 29 =
  22. 22.Digital root of 15 × 28 =
  23. 23.Digital root of 61550 =
  24. 24.Digital root of 622 =
  25. 25.Digital root of 49 × 61 =
  26. 26.Digital root of 64 × 62 =
  27. 27.Digital root of 35822 =
  28. 28.Digital root of 51 × 90 =
  29. 29.Digital root of 48126 =
  30. 30.Digital root of 17 × 35 =
  31. 31.Digital root of 78 × 68 =
  32. 32.Digital root of 10485 =
  33. 33.Digital root of 50358 =
  34. 34.Digital root of 81 × 70 =
  35. 35.Digital root of 66697 =
  36. 36.Digital root of 24 × 69 =
  37. 37.Digital root of 80475 =
  38. 38.Digital root of 93679 =
  39. 39.Digital root of 25 × 80 =
  40. 40.Digital root of 26 × 43 =

Answer key

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

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