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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 802 · 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. 1.160² =
  2. 2.2505² =
  3. 3.547² =
  4. 4.909² =
  5. 5.336² =
  6. 6.210² =
  7. 7.4212² =
  8. 8.201² =
  9. 9.220² =
  10. 10.828² =
  11. 11.377² =
  12. 12.265² =
  13. 13.185² =
  14. 14.632² =
  15. 15.312² =
  16. 16.2443² =
  17. 17.523² =
  18. 18.960² =
  19. 19.213² =
  20. 20.824² =
  21. 21.263² =
  22. 22.726² =
  23. 23.720² =
  24. 24.895² =
  25. 25.754² =
  26. 26.880² =
  27. 27.447² =
  28. 28.305² =
  29. 29.653² =
  30. 30.402² =
  31. 31.358² =
  32. 32.890² =
  33. 33.260² =
  34. 34.469² =
  35. 35.2521² =
  36. 36.444² =
  37. 37.695² =
  38. 38.449² =
  39. 39.309² =
  40. 40.4618² =

Answer key

  1. 25600
  2. 6275025
  3. 299209
  4. 826281
  5. 112896
  6. 44100
  7. 17740944
  8. 40401
  9. 48400
  10. 685584
  11. 142129
  12. 70225
  13. 34225
  14. 399424
  15. 97344
  16. 5968249
  17. 273529
  18. 921600
  19. 45369
  20. 678976
  21. 69169
  22. 527076
  23. 518400
  24. 801025
  25. 568516
  26. 774400
  27. 199809
  28. 93025
  29. 426409
  30. 161604
  31. 128164
  32. 792100
  33. 67600
  34. 219961
  35. 6355441
  36. 197136
  37. 483025
  38. 201601
  39. 95481
  40. 21325924

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