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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 707 · 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 63 × 55 =
  2. 2.Digital root of 16561 =
  3. 3.Digital root of 13 × 66 =
  4. 4.Digital root of 80 × 51 =
  5. 5.Digital root of 36203 =
  6. 6.Digital root of 77 × 92 =
  7. 7.Digital root of 95 × 18 =
  8. 8.Digital root of 54 × 60 =
  9. 9.Digital root of 38 × 44 =
  10. 10.Digital root of 41979 =
  11. 11.Digital root of 24884 =
  12. 12.Digital root of 79 × 65 =
  13. 13.Digital root of 21 × 18 =
  14. 14.Digital root of 12 × 89 =
  15. 15.Digital root of 98 × 60 =
  16. 16.Digital root of 50695 =
  17. 17.Digital root of 66717 =
  18. 18.Digital root of 51388 =
  19. 19.Digital root of 27921 =
  20. 20.Digital root of 46600 =
  21. 21.Digital root of 24 × 14 =
  22. 22.Digital root of 67720 =
  23. 23.Digital root of 73 × 94 =
  24. 24.Digital root of 34 × 76 =
  25. 25.Digital root of 27045 =
  26. 26.Digital root of 43809 =
  27. 27.Digital root of 16 × 86 =
  28. 28.Digital root of 23 × 90 =
  29. 29.Digital root of 54958 =
  30. 30.Digital root of 92 × 16 =
  31. 31.Digital root of 51 × 66 =
  32. 32.Digital root of 35317 =
  33. 33.Digital root of 32 × 87 =
  34. 34.Digital root of 27 × 90 =
  35. 35.Digital root of 53271 =
  36. 36.Digital root of 22 × 85 =
  37. 37.Digital root of 45 × 35 =
  38. 38.Digital root of 7475 =
  39. 39.Digital root of 46999 =
  40. 40.Digital root of 82 × 28 =

Answer key

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

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