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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 430 · 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 21983 =
  2. 2.Digital root of 29470 =
  3. 3.Digital root of 73 × 55 =
  4. 4.Digital root of 68 × 77 =
  5. 5.Digital root of 46 × 18 =
  6. 6.Digital root of 62 × 33 =
  7. 7.Digital root of 22 × 18 =
  8. 8.Digital root of 412 =
  9. 9.Digital root of 46 × 92 =
  10. 10.Digital root of 81263 =
  11. 11.Digital root of 65020 =
  12. 12.Digital root of 43 × 96 =
  13. 13.Digital root of 79987 =
  14. 14.Digital root of 79909 =
  15. 15.Digital root of 55038 =
  16. 16.Digital root of 39 × 33 =
  17. 17.Digital root of 32853 =
  18. 18.Digital root of 14 × 63 =
  19. 19.Digital root of 21624 =
  20. 20.Digital root of 19 × 83 =
  21. 21.Digital root of 72 × 56 =
  22. 22.Digital root of 98 × 66 =
  23. 23.Digital root of 11215 =
  24. 24.Digital root of 23547 =
  25. 25.Digital root of 43 × 39 =
  26. 26.Digital root of 28600 =
  27. 27.Digital root of 78 × 21 =
  28. 28.Digital root of 64 × 53 =
  29. 29.Digital root of 71524 =
  30. 30.Digital root of 55 × 47 =
  31. 31.Digital root of 66 × 21 =
  32. 32.Digital root of 51772 =
  33. 33.Digital root of 52 × 95 =
  34. 34.Digital root of 80 × 20 =
  35. 35.Digital root of 5334 =
  36. 36.Digital root of 86750 =
  37. 37.Digital root of 63812 =
  38. 38.Digital root of 87455 =
  39. 39.Digital root of 12002 =
  40. 40.Digital root of 87 × 41 =

Answer key

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

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