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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 828 · 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 41 × 95 =
  2. 2.Digital root of 79 × 85 =
  3. 3.Digital root of 38834 =
  4. 4.Digital root of 30255 =
  5. 5.Digital root of 67 × 43 =
  6. 6.Digital root of 31 × 46 =
  7. 7.Digital root of 58 × 32 =
  8. 8.Digital root of 97 × 18 =
  9. 9.Digital root of 80836 =
  10. 10.Digital root of 49629 =
  11. 11.Digital root of 17 × 16 =
  12. 12.Digital root of 90 × 47 =
  13. 13.Digital root of 67662 =
  14. 14.Digital root of 98773 =
  15. 15.Digital root of 78206 =
  16. 16.Digital root of 93901 =
  17. 17.Digital root of 45 × 31 =
  18. 18.Digital root of 62984 =
  19. 19.Digital root of 72 × 72 =
  20. 20.Digital root of 43546 =
  21. 21.Digital root of 17475 =
  22. 22.Digital root of 17 × 77 =
  23. 23.Digital root of 68 × 79 =
  24. 24.Digital root of 28044 =
  25. 25.Digital root of 31395 =
  26. 26.Digital root of 69 × 59 =
  27. 27.Digital root of 92 × 19 =
  28. 28.Digital root of 47 × 90 =
  29. 29.Digital root of 63825 =
  30. 30.Digital root of 93 × 26 =
  31. 31.Digital root of 36745 =
  32. 32.Digital root of 66905 =
  33. 33.Digital root of 75564 =
  34. 34.Digital root of 64111 =
  35. 35.Digital root of 87 × 46 =
  36. 36.Digital root of 96 × 89 =
  37. 37.Digital root of 51 × 70 =
  38. 38.Digital root of 16 × 83 =
  39. 39.Digital root of 46420 =
  40. 40.Digital root of 35 × 51 =

Answer key

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

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