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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 999 · 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 28342 =
  2. 2.Digital root of 12778 =
  3. 3.Digital root of 71810 =
  4. 4.Digital root of 39 × 13 =
  5. 5.Digital root of 78 × 87 =
  6. 6.Digital root of 61 × 21 =
  7. 7.Digital root of 52 × 65 =
  8. 8.Digital root of 90 × 65 =
  9. 9.Digital root of 23742 =
  10. 10.Digital root of 64 × 56 =
  11. 11.Digital root of 78470 =
  12. 12.Digital root of 10845 =
  13. 13.Digital root of 3969 =
  14. 14.Digital root of 76091 =
  15. 15.Digital root of 79 × 68 =
  16. 16.Digital root of 52613 =
  17. 17.Digital root of 75666 =
  18. 18.Digital root of 82 × 95 =
  19. 19.Digital root of 88 × 44 =
  20. 20.Digital root of 45 × 77 =
  21. 21.Digital root of 30301 =
  22. 22.Digital root of 43 × 46 =
  23. 23.Digital root of 36362 =
  24. 24.Digital root of 97251 =
  25. 25.Digital root of 542 =
  26. 26.Digital root of 88892 =
  27. 27.Digital root of 30 × 85 =
  28. 28.Digital root of 4278 =
  29. 29.Digital root of 80105 =
  30. 30.Digital root of 90 × 98 =
  31. 31.Digital root of 56 × 70 =
  32. 32.Digital root of 75 × 44 =
  33. 33.Digital root of 67 × 44 =
  34. 34.Digital root of 47 × 90 =
  35. 35.Digital root of 54 × 28 =
  36. 36.Digital root of 12214 =
  37. 37.Digital root of 62 × 17 =
  38. 38.Digital root of 50 × 68 =
  39. 39.Digital root of 94518 =
  40. 40.Digital root of 55 × 96 =

Answer key

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

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