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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 457 · 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 17 × 79 =
  2. 2.Digital root of 20 × 23 =
  3. 3.Digital root of 29793 =
  4. 4.Digital root of 71947 =
  5. 5.Digital root of 23537 =
  6. 6.Digital root of 25 × 51 =
  7. 7.Digital root of 56 × 80 =
  8. 8.Digital root of 90 × 31 =
  9. 9.Digital root of 90235 =
  10. 10.Digital root of 17 × 61 =
  11. 11.Digital root of 68 × 34 =
  12. 12.Digital root of 16 × 56 =
  13. 13.Digital root of 25 × 99 =
  14. 14.Digital root of 54 × 56 =
  15. 15.Digital root of 85 × 96 =
  16. 16.Digital root of 79032 =
  17. 17.Digital root of 70 × 59 =
  18. 18.Digital root of 80 × 87 =
  19. 19.Digital root of 73962 =
  20. 20.Digital root of 78 × 48 =
  21. 21.Digital root of 80 × 30 =
  22. 22.Digital root of 18701 =
  23. 23.Digital root of 26 × 58 =
  24. 24.Digital root of 84 × 30 =
  25. 25.Digital root of 79926 =
  26. 26.Digital root of 10930 =
  27. 27.Digital root of 91 × 54 =
  28. 28.Digital root of 33 × 21 =
  29. 29.Digital root of 12 × 14 =
  30. 30.Digital root of 60 × 68 =
  31. 31.Digital root of 72036 =
  32. 32.Digital root of 23 × 12 =
  33. 33.Digital root of 42899 =
  34. 34.Digital root of 92 × 12 =
  35. 35.Digital root of 35 × 59 =
  36. 36.Digital root of 86633 =
  37. 37.Digital root of 65878 =
  38. 38.Digital root of 60 × 35 =
  39. 39.Digital root of 45674 =
  40. 40.Digital root of 31394 =

Answer key

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

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