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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 586 · 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 13 × 61 =
  2. 2.Digital root of 16495 =
  3. 3.Digital root of 44341 =
  4. 4.Digital root of 87135 =
  5. 5.Digital root of 33154 =
  6. 6.Digital root of 12145 =
  7. 7.Digital root of 68 × 47 =
  8. 8.Digital root of 87791 =
  9. 9.Digital root of 22 × 84 =
  10. 10.Digital root of 89210 =
  11. 11.Digital root of 28 × 68 =
  12. 12.Digital root of 75003 =
  13. 13.Digital root of 22 × 29 =
  14. 14.Digital root of 18818 =
  15. 15.Digital root of 53872 =
  16. 16.Digital root of 32311 =
  17. 17.Digital root of 28 × 30 =
  18. 18.Digital root of 33241 =
  19. 19.Digital root of 4817 =
  20. 20.Digital root of 75801 =
  21. 21.Digital root of 20879 =
  22. 22.Digital root of 52 × 77 =
  23. 23.Digital root of 58718 =
  24. 24.Digital root of 62 × 45 =
  25. 25.Digital root of 69 × 19 =
  26. 26.Digital root of 28745 =
  27. 27.Digital root of 81616 =
  28. 28.Digital root of 27547 =
  29. 29.Digital root of 49519 =
  30. 30.Digital root of 21213 =
  31. 31.Digital root of 43846 =
  32. 32.Digital root of 71532 =
  33. 33.Digital root of 60400 =
  34. 34.Digital root of 23 × 80 =
  35. 35.Digital root of 5133 =
  36. 36.Digital root of 77 × 85 =
  37. 37.Digital root of 12 × 91 =
  38. 38.Digital root of 64 × 82 =
  39. 39.Digital root of 19 × 95 =
  40. 40.Digital root of 6007 =

Answer key

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

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