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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 639 · 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 46 × 43 =
  2. 2.Digital root of 15 × 95 =
  3. 3.Digital root of 9735 =
  4. 4.Digital root of 95 × 96 =
  5. 5.Digital root of 33 × 23 =
  6. 6.Digital root of 58025 =
  7. 7.Digital root of 87 × 93 =
  8. 8.Digital root of 97 × 73 =
  9. 9.Digital root of 82 × 22 =
  10. 10.Digital root of 43499 =
  11. 11.Digital root of 97300 =
  12. 12.Digital root of 87728 =
  13. 13.Digital root of 88015 =
  14. 14.Digital root of 51 × 21 =
  15. 15.Digital root of 48 × 13 =
  16. 16.Digital root of 49483 =
  17. 17.Digital root of 22309 =
  18. 18.Digital root of 91 × 92 =
  19. 19.Digital root of 93 × 93 =
  20. 20.Digital root of 91 × 92 =
  21. 21.Digital root of 38 × 57 =
  22. 22.Digital root of 17 × 74 =
  23. 23.Digital root of 93931 =
  24. 24.Digital root of 8186 =
  25. 25.Digital root of 20154 =
  26. 26.Digital root of 47 × 21 =
  27. 27.Digital root of 79975 =
  28. 28.Digital root of 61461 =
  29. 29.Digital root of 7405 =
  30. 30.Digital root of 45374 =
  31. 31.Digital root of 89967 =
  32. 32.Digital root of 51567 =
  33. 33.Digital root of 79831 =
  34. 34.Digital root of 33 × 12 =
  35. 35.Digital root of 97 × 32 =
  36. 36.Digital root of 27369 =
  37. 37.Digital root of 23 × 64 =
  38. 38.Digital root of 46499 =
  39. 39.Digital root of 84 × 45 =
  40. 40.Digital root of 77 × 36 =

Answer key

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

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