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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 686 · 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. 1.790² =
  2. 2.728² =
  3. 3.882² =
  4. 4.687² =
  5. 5.1713² =
  6. 6.511² =
  7. 7.960² =
  8. 8.5806² =
  9. 9.123² =
  10. 10.721² =
  11. 11.7765² =
  12. 12.9962² =
  13. 13.713² =
  14. 14.1295² =
  15. 15.653² =
  16. 16.817² =
  17. 17.6335² =
  18. 18.334² =
  19. 19.205² =
  20. 20.529² =
  21. 21.284² =
  22. 22.936² =
  23. 23.106² =
  24. 24.894² =
  25. 25.7729² =
  26. 26.5750² =
  27. 27.1125² =
  28. 28.779² =
  29. 29.9035² =
  30. 30.346² =
  31. 31.790² =
  32. 32.357² =
  33. 33.361² =
  34. 34.7653² =
  35. 35.2560² =
  36. 36.142² =
  37. 37.307² =
  38. 38.654² =
  39. 39.559² =
  40. 40.364² =

Answer key

  1. 624100
  2. 529984
  3. 777924
  4. 471969
  5. 2934369
  6. 261121
  7. 921600
  8. 33709636
  9. 15129
  10. 519841
  11. 60295225
  12. 99241444
  13. 508369
  14. 1677025
  15. 426409
  16. 667489
  17. 40132225
  18. 111556
  19. 42025
  20. 279841
  21. 80656
  22. 876096
  23. 11236
  24. 799236
  25. 59737441
  26. 33062500
  27. 1265625
  28. 606841
  29. 81631225
  30. 119716
  31. 624100
  32. 127449
  33. 130321
  34. 58568409
  35. 6553600
  36. 20164
  37. 94249
  38. 427716
  39. 312481
  40. 132496

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