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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 742 · 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. 1.443² =
  2. 2.144² =
  3. 3.280² =
  4. 4.511² =
  5. 5.797² =
  6. 6.578² =
  7. 7.904² =
  8. 8.6743² =
  9. 9.649² =
  10. 10.197² =
  11. 11.375² =
  12. 12.3724² =
  13. 13.898² =
  14. 14.435² =
  15. 15.470² =
  16. 16.225² =
  17. 17.984² =
  18. 18.538² =
  19. 19.192² =
  20. 20.6818² =
  21. 21.773² =
  22. 22.576² =
  23. 23.7729² =
  24. 24.825² =
  25. 25.5287² =
  26. 26.247² =
  27. 27.687² =
  28. 28.875² =
  29. 29.361² =
  30. 30.187² =
  31. 31.757² =
  32. 32.659² =
  33. 33.441² =
  34. 34.6310² =
  35. 35.579² =
  36. 36.293² =
  37. 37.997² =
  38. 38.8255² =
  39. 39.116² =
  40. 40.1296² =

Answer key

  1. 196249
  2. 20736
  3. 78400
  4. 261121
  5. 635209
  6. 334084
  7. 817216
  8. 45468049
  9. 421201
  10. 38809
  11. 140625
  12. 13868176
  13. 806404
  14. 189225
  15. 220900
  16. 50625
  17. 968256
  18. 289444
  19. 36864
  20. 46485124
  21. 597529
  22. 331776
  23. 59737441
  24. 680625
  25. 27952369
  26. 61009
  27. 471969
  28. 765625
  29. 130321
  30. 34969
  31. 573049
  32. 434281
  33. 194481
  34. 39816100
  35. 335241
  36. 85849
  37. 994009
  38. 68145025
  39. 13456
  40. 1679616

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