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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 598 · 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 49 × 62 =
  2. 2.Digital root of 9545 =
  3. 3.Digital root of 10004 =
  4. 4.Digital root of 75090 =
  5. 5.Digital root of 65878 =
  6. 6.Digital root of 4832 =
  7. 7.Digital root of 82 × 21 =
  8. 8.Digital root of 89 × 38 =
  9. 9.Digital root of 85 × 35 =
  10. 10.Digital root of 43 × 54 =
  11. 11.Digital root of 57 × 74 =
  12. 12.Digital root of 90069 =
  13. 13.Digital root of 13 × 23 =
  14. 14.Digital root of 19 × 59 =
  15. 15.Digital root of 74406 =
  16. 16.Digital root of 22 × 23 =
  17. 17.Digital root of 93 × 18 =
  18. 18.Digital root of 26846 =
  19. 19.Digital root of 22 × 16 =
  20. 20.Digital root of 81 × 85 =
  21. 21.Digital root of 59 × 40 =
  22. 22.Digital root of 1609 =
  23. 23.Digital root of 45880 =
  24. 24.Digital root of 1600 =
  25. 25.Digital root of 30 × 34 =
  26. 26.Digital root of 94 × 92 =
  27. 27.Digital root of 11463 =
  28. 28.Digital root of 79449 =
  29. 29.Digital root of 88 × 12 =
  30. 30.Digital root of 24 × 81 =
  31. 31.Digital root of 17 × 89 =
  32. 32.Digital root of 78 × 27 =
  33. 33.Digital root of 12 × 54 =
  34. 34.Digital root of 64984 =
  35. 35.Digital root of 69 × 76 =
  36. 36.Digital root of 69549 =
  37. 37.Digital root of 52 × 95 =
  38. 38.Digital root of 29668 =
  39. 39.Digital root of 30 × 60 =
  40. 40.Digital root of 12 × 31 =

Answer key

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

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