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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 91 · 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. 1.799² =
  2. 2.795² =
  3. 3.286² =
  4. 4.5050² =
  5. 5.319² =
  6. 6.171² =
  7. 7.479² =
  8. 8.895² =
  9. 9.856² =
  10. 10.7679² =
  11. 11.154² =
  12. 12.837² =
  13. 13.2123² =
  14. 14.669² =
  15. 15.3412² =
  16. 16.704² =
  17. 17.3838² =
  18. 18.408² =
  19. 19.933² =
  20. 20.238² =
  21. 21.262² =
  22. 22.131² =
  23. 23.713² =
  24. 24.839² =
  25. 25.5273² =
  26. 26.2964² =
  27. 27.858² =
  28. 28.253² =
  29. 29.9761² =
  30. 30.8683² =
  31. 31.237² =
  32. 32.207² =
  33. 33.693² =
  34. 34.150² =
  35. 35.748² =
  36. 36.620² =
  37. 37.8981² =
  38. 38.5575² =
  39. 39.109² =
  40. 40.144² =

Answer key

  1. 638401
  2. 632025
  3. 81796
  4. 25502500
  5. 101761
  6. 29241
  7. 229441
  8. 801025
  9. 732736
  10. 58967041
  11. 23716
  12. 700569
  13. 4507129
  14. 447561
  15. 11641744
  16. 495616
  17. 14730244
  18. 166464
  19. 870489
  20. 56644
  21. 68644
  22. 17161
  23. 508369
  24. 703921
  25. 27804529
  26. 8785296
  27. 736164
  28. 64009
  29. 95277121
  30. 75394489
  31. 56169
  32. 42849
  33. 480249
  34. 22500
  35. 559504
  36. 384400
  37. 80658361
  38. 31080625
  39. 11881
  40. 20736

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