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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 450 · 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 37 × 64 =
  2. 2.Digital root of 50 × 29 =
  3. 3.Digital root of 41 × 35 =
  4. 4.Digital root of 42772 =
  5. 5.Digital root of 72 × 18 =
  6. 6.Digital root of 78 × 46 =
  7. 7.Digital root of 38 × 58 =
  8. 8.Digital root of 17 × 80 =
  9. 9.Digital root of 58102 =
  10. 10.Digital root of 54 × 44 =
  11. 11.Digital root of 87683 =
  12. 12.Digital root of 53 × 85 =
  13. 13.Digital root of 43350 =
  14. 14.Digital root of 25056 =
  15. 15.Digital root of 14 × 21 =
  16. 16.Digital root of 88 × 55 =
  17. 17.Digital root of 91 × 51 =
  18. 18.Digital root of 64251 =
  19. 19.Digital root of 65202 =
  20. 20.Digital root of 49678 =
  21. 21.Digital root of 37362 =
  22. 22.Digital root of 79 × 79 =
  23. 23.Digital root of 9965 =
  24. 24.Digital root of 53540 =
  25. 25.Digital root of 61 × 90 =
  26. 26.Digital root of 82 × 12 =
  27. 27.Digital root of 51 × 60 =
  28. 28.Digital root of 10524 =
  29. 29.Digital root of 37 × 31 =
  30. 30.Digital root of 30279 =
  31. 31.Digital root of 53 × 22 =
  32. 32.Digital root of 89 × 67 =
  33. 33.Digital root of 87 × 20 =
  34. 34.Digital root of 7137 =
  35. 35.Digital root of 36533 =
  36. 36.Digital root of 85953 =
  37. 37.Digital root of 99317 =
  38. 38.Digital root of 17574 =
  39. 39.Digital root of 30 × 17 =
  40. 40.Digital root of 44 × 61 =

Answer key

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

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