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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 628 · 40 sums
TalentJR

The trick (Dwandwa Yoga): For abc: columns D(a) | D(ab) | D(abc) | D(bc) | D(c). D(a) = a², D(ab) = 2ab, D(abc) = 2ac + b², D(abcd) = 2ad + 2bc. Combine from the right with carries.

NameDateTime takenScore ___ / 40
  1. 1.1620² =
  2. 2.559² =
  3. 3.991² =
  4. 4.172² =
  5. 5.973² =
  6. 6.478² =
  7. 7.955² =
  8. 8.841² =
  9. 9.4803² =
  10. 10.140² =
  11. 11.314² =
  12. 12.636² =
  13. 13.8772² =
  14. 14.548² =
  15. 15.255² =
  16. 16.9959² =
  17. 17.428² =
  18. 18.327² =
  19. 19.7240² =
  20. 20.416² =
  21. 21.449² =
  22. 22.510² =
  23. 23.802² =
  24. 24.785² =
  25. 25.871² =
  26. 26.930² =
  27. 27.8650² =
  28. 28.1386² =
  29. 29.6494² =
  30. 30.266² =
  31. 31.478² =
  32. 32.2346² =
  33. 33.2921² =
  34. 34.269² =
  35. 35.765² =
  36. 36.973² =
  37. 37.532² =
  38. 38.4911² =
  39. 39.337² =
  40. 40.665² =

Answer key

  1. 2624400
  2. 312481
  3. 982081
  4. 29584
  5. 946729
  6. 228484
  7. 912025
  8. 707281
  9. 23068809
  10. 19600
  11. 98596
  12. 404496
  13. 76947984
  14. 300304
  15. 65025
  16. 99181681
  17. 183184
  18. 106929
  19. 52417600
  20. 173056
  21. 201601
  22. 260100
  23. 643204
  24. 616225
  25. 758641
  26. 864900
  27. 74822500
  28. 1920996
  29. 42172036
  30. 70756
  31. 228484
  32. 5503716
  33. 8532241
  34. 72361
  35. 585225
  36. 946729
  37. 283024
  38. 24117921
  39. 113569
  40. 442225

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