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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 368 · 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 51692 =
  2. 2.Digital root of 9651 =
  3. 3.Digital root of 91 × 35 =
  4. 4.Digital root of 91 × 33 =
  5. 5.Digital root of 18179 =
  6. 6.Digital root of 78 × 41 =
  7. 7.Digital root of 53159 =
  8. 8.Digital root of 33815 =
  9. 9.Digital root of 50 × 15 =
  10. 10.Digital root of 55 × 28 =
  11. 11.Digital root of 10523 =
  12. 12.Digital root of 23158 =
  13. 13.Digital root of 50271 =
  14. 14.Digital root of 81 × 20 =
  15. 15.Digital root of 57 × 98 =
  16. 16.Digital root of 99 × 97 =
  17. 17.Digital root of 21150 =
  18. 18.Digital root of 75423 =
  19. 19.Digital root of 19345 =
  20. 20.Digital root of 13861 =
  21. 21.Digital root of 90319 =
  22. 22.Digital root of 34 × 91 =
  23. 23.Digital root of 69 × 67 =
  24. 24.Digital root of 35 × 53 =
  25. 25.Digital root of 54 × 88 =
  26. 26.Digital root of 31 × 39 =
  27. 27.Digital root of 98702 =
  28. 28.Digital root of 20 × 53 =
  29. 29.Digital root of 40 × 41 =
  30. 30.Digital root of 43427 =
  31. 31.Digital root of 98 × 44 =
  32. 32.Digital root of 94 × 14 =
  33. 33.Digital root of 24671 =
  34. 34.Digital root of 98450 =
  35. 35.Digital root of 92761 =
  36. 36.Digital root of 4315 =
  37. 37.Digital root of 21 × 46 =
  38. 38.Digital root of 28 × 47 =
  39. 39.Digital root of 49083 =
  40. 40.Digital root of 30 × 78 =

Answer key

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

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