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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 648 · 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 48 × 61 =
  2. 2.Digital root of 9268 =
  3. 3.Digital root of 21 × 43 =
  4. 4.Digital root of 73386 =
  5. 5.Digital root of 70106 =
  6. 6.Digital root of 42862 =
  7. 7.Digital root of 52725 =
  8. 8.Digital root of 85 × 88 =
  9. 9.Digital root of 54343 =
  10. 10.Digital root of 21 × 53 =
  11. 11.Digital root of 81 × 60 =
  12. 12.Digital root of 5861 =
  13. 13.Digital root of 12617 =
  14. 14.Digital root of 18009 =
  15. 15.Digital root of 36538 =
  16. 16.Digital root of 28 × 89 =
  17. 17.Digital root of 91 × 97 =
  18. 18.Digital root of 61 × 44 =
  19. 19.Digital root of 74 × 86 =
  20. 20.Digital root of 74117 =
  21. 21.Digital root of 29275 =
  22. 22.Digital root of 83160 =
  23. 23.Digital root of 61 × 81 =
  24. 24.Digital root of 67 × 94 =
  25. 25.Digital root of 18 × 73 =
  26. 26.Digital root of 77476 =
  27. 27.Digital root of 46 × 97 =
  28. 28.Digital root of 76 × 15 =
  29. 29.Digital root of 93474 =
  30. 30.Digital root of 26203 =
  31. 31.Digital root of 88779 =
  32. 32.Digital root of 5726 =
  33. 33.Digital root of 38161 =
  34. 34.Digital root of 58481 =
  35. 35.Digital root of 97 × 91 =
  36. 36.Digital root of 90383 =
  37. 37.Digital root of 14 × 92 =
  38. 38.Digital root of 34547 =
  39. 39.Digital root of 12 × 27 =
  40. 40.Digital root of 42 × 26 =

Answer key

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

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