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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 537 · 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 23 × 82 =
  2. 2.Digital root of 18440 =
  3. 3.Digital root of 44 × 65 =
  4. 4.Digital root of 1776 =
  5. 5.Digital root of 15280 =
  6. 6.Digital root of 71 × 65 =
  7. 7.Digital root of 17713 =
  8. 8.Digital root of 30 × 55 =
  9. 9.Digital root of 79238 =
  10. 10.Digital root of 71341 =
  11. 11.Digital root of 97 × 43 =
  12. 12.Digital root of 16177 =
  13. 13.Digital root of 43812 =
  14. 14.Digital root of 42750 =
  15. 15.Digital root of 85 × 87 =
  16. 16.Digital root of 36 × 95 =
  17. 17.Digital root of 70 × 16 =
  18. 18.Digital root of 84 × 98 =
  19. 19.Digital root of 36925 =
  20. 20.Digital root of 20 × 16 =
  21. 21.Digital root of 34495 =
  22. 22.Digital root of 92 × 76 =
  23. 23.Digital root of 68 × 47 =
  24. 24.Digital root of 54 × 62 =
  25. 25.Digital root of 92 × 72 =
  26. 26.Digital root of 51840 =
  27. 27.Digital root of 48 × 38 =
  28. 28.Digital root of 80 × 24 =
  29. 29.Digital root of 29922 =
  30. 30.Digital root of 15242 =
  31. 31.Digital root of 26173 =
  32. 32.Digital root of 84 × 58 =
  33. 33.Digital root of 32640 =
  34. 34.Digital root of 37 × 41 =
  35. 35.Digital root of 56 × 71 =
  36. 36.Digital root of 20 × 31 =
  37. 37.Digital root of 36 × 75 =
  38. 38.Digital root of 94824 =
  39. 39.Digital root of 55415 =
  40. 40.Digital root of 29 × 95 =

Answer key

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

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