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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 789 · 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. 1.130² =
  2. 2.721² =
  3. 3.265² =
  4. 4.9561² =
  5. 5.821² =
  6. 6.782² =
  7. 7.421² =
  8. 8.688² =
  9. 9.816² =
  10. 10.4054² =
  11. 11.538² =
  12. 12.145² =
  13. 13.693² =
  14. 14.255² =
  15. 15.999² =
  16. 16.849² =
  17. 17.377² =
  18. 18.4809² =
  19. 19.451² =
  20. 20.627² =
  21. 21.953² =
  22. 22.2195² =
  23. 23.294² =
  24. 24.640² =
  25. 25.995² =
  26. 26.999² =
  27. 27.795² =
  28. 28.550² =
  29. 29.858² =
  30. 30.851² =
  31. 31.403² =
  32. 32.885² =
  33. 33.867² =
  34. 34.412² =
  35. 35.423² =
  36. 36.759² =
  37. 37.531² =
  38. 38.980² =
  39. 39.420² =
  40. 40.311² =

Answer key

  1. 16900
  2. 519841
  3. 70225
  4. 91412721
  5. 674041
  6. 611524
  7. 177241
  8. 473344
  9. 665856
  10. 16434916
  11. 289444
  12. 21025
  13. 480249
  14. 65025
  15. 998001
  16. 720801
  17. 142129
  18. 23126481
  19. 203401
  20. 393129
  21. 908209
  22. 4818025
  23. 86436
  24. 409600
  25. 990025
  26. 998001
  27. 632025
  28. 302500
  29. 736164
  30. 724201
  31. 162409
  32. 783225
  33. 751689
  34. 169744
  35. 178929
  36. 576081
  37. 281961
  38. 960400
  39. 176400
  40. 96721

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