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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 21 · 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. 1.1989² =
  2. 2.8428² =
  3. 3.237² =
  4. 4.8104² =
  5. 5.805² =
  6. 6.818² =
  7. 7.868² =
  8. 8.661² =
  9. 9.902² =
  10. 10.277² =
  11. 11.272² =
  12. 12.722² =
  13. 13.444² =
  14. 14.469² =
  15. 15.303² =
  16. 16.566² =
  17. 17.1078² =
  18. 18.242² =
  19. 19.190² =
  20. 20.8480² =
  21. 21.106² =
  22. 22.493² =
  23. 23.5808² =
  24. 24.163² =
  25. 25.531² =
  26. 26.455² =
  27. 27.174² =
  28. 28.123² =
  29. 29.1124² =
  30. 30.224² =
  31. 31.291² =
  32. 32.600² =
  33. 33.588² =
  34. 34.467² =
  35. 35.122² =
  36. 36.778² =
  37. 37.5018² =
  38. 38.881² =
  39. 39.963² =
  40. 40.885² =

Answer key

  1. 3956121
  2. 71031184
  3. 56169
  4. 65674816
  5. 648025
  6. 669124
  7. 753424
  8. 436921
  9. 813604
  10. 76729
  11. 73984
  12. 521284
  13. 197136
  14. 219961
  15. 91809
  16. 320356
  17. 1162084
  18. 58564
  19. 36100
  20. 71910400
  21. 11236
  22. 243049
  23. 33732864
  24. 26569
  25. 281961
  26. 207025
  27. 30276
  28. 15129
  29. 1263376
  30. 50176
  31. 84681
  32. 360000
  33. 345744
  34. 218089
  35. 14884
  36. 605284
  37. 25180324
  38. 776161
  39. 927369
  40. 783225

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