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Digital Root Worksheet

Vedic maths trick 12: Digital roots — check any answer · Set 161 · 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 79 × 20 =
  2. 2.Digital root of 26680 =
  3. 3.Digital root of 57 × 27 =
  4. 4.Digital root of 77170 =
  5. 5.Digital root of 29 × 88 =
  6. 6.Digital root of 58 × 45 =
  7. 7.Digital root of 78441 =
  8. 8.Digital root of 17 × 29 =
  9. 9.Digital root of 62 × 22 =
  10. 10.Digital root of 37728 =
  11. 11.Digital root of 95 × 53 =
  12. 12.Digital root of 62 × 47 =
  13. 13.Digital root of 43 × 15 =
  14. 14.Digital root of 33379 =
  15. 15.Digital root of 51 × 55 =
  16. 16.Digital root of 42159 =
  17. 17.Digital root of 15418 =
  18. 18.Digital root of 29893 =
  19. 19.Digital root of 94 × 90 =
  20. 20.Digital root of 8259 =
  21. 21.Digital root of 20129 =
  22. 22.Digital root of 74 × 16 =
  23. 23.Digital root of 19 × 27 =
  24. 24.Digital root of 58 × 92 =
  25. 25.Digital root of 24481 =
  26. 26.Digital root of 51 × 22 =
  27. 27.Digital root of 67 × 29 =
  28. 28.Digital root of 59 × 29 =
  29. 29.Digital root of 50 × 28 =
  30. 30.Digital root of 94454 =
  31. 31.Digital root of 85388 =
  32. 32.Digital root of 61 × 47 =
  33. 33.Digital root of 83 × 89 =
  34. 34.Digital root of 89898 =
  35. 35.Digital root of 50372 =
  36. 36.Digital root of 12116 =
  37. 37.Digital root of 25976 =
  38. 38.Digital root of 95 × 25 =
  39. 39.Digital root of 2763 =
  40. 40.Digital root of 81 × 37 =

Answer key

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

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