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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 820 · 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. 1.664² =
  2. 2.679² =
  3. 3.8920² =
  4. 4.7586² =
  5. 5.102² =
  6. 6.8347² =
  7. 7.213² =
  8. 8.285² =
  9. 9.240² =
  10. 10.269² =
  11. 11.2883² =
  12. 12.329² =
  13. 13.575² =
  14. 14.212² =
  15. 15.1910² =
  16. 16.207² =
  17. 17.5941² =
  18. 18.4025² =
  19. 19.519² =
  20. 20.825² =
  21. 21.620² =
  22. 22.186² =
  23. 23.505² =
  24. 24.972² =
  25. 25.3445² =
  26. 26.267² =
  27. 27.778² =
  28. 28.5743² =
  29. 29.801² =
  30. 30.555² =
  31. 31.2803² =
  32. 32.451² =
  33. 33.543² =
  34. 34.153² =
  35. 35.307² =
  36. 36.3543² =
  37. 37.399² =
  38. 38.703² =
  39. 39.230² =
  40. 40.439² =

Answer key

  1. 440896
  2. 461041
  3. 79566400
  4. 57547396
  5. 10404
  6. 69672409
  7. 45369
  8. 81225
  9. 57600
  10. 72361
  11. 8311689
  12. 108241
  13. 330625
  14. 44944
  15. 3648100
  16. 42849
  17. 35295481
  18. 16200625
  19. 269361
  20. 680625
  21. 384400
  22. 34596
  23. 255025
  24. 944784
  25. 11868025
  26. 71289
  27. 605284
  28. 32982049
  29. 641601
  30. 308025
  31. 7856809
  32. 203401
  33. 294849
  34. 23409
  35. 94249
  36. 12552849
  37. 159201
  38. 494209
  39. 52900
  40. 192721

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