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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 128 · 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. 1.549² =
  2. 2.263² =
  3. 3.655² =
  4. 4.454² =
  5. 5.580² =
  6. 6.121² =
  7. 7.642² =
  8. 8.825² =
  9. 9.511² =
  10. 10.6449² =
  11. 11.341² =
  12. 12.497² =
  13. 13.995² =
  14. 14.846² =
  15. 15.412² =
  16. 16.254² =
  17. 17.7231² =
  18. 18.987² =
  19. 19.635² =
  20. 20.453² =
  21. 21.122² =
  22. 22.485² =
  23. 23.870² =
  24. 24.8610² =
  25. 25.267² =
  26. 26.509² =
  27. 27.710² =
  28. 28.656² =
  29. 29.995² =
  30. 30.170² =
  31. 31.5081² =
  32. 32.164² =
  33. 33.662² =
  34. 34.3143² =
  35. 35.565² =
  36. 36.912² =
  37. 37.306² =
  38. 38.3767² =
  39. 39.190² =
  40. 40.8603² =

Answer key

  1. 301401
  2. 69169
  3. 429025
  4. 206116
  5. 336400
  6. 14641
  7. 412164
  8. 680625
  9. 261121
  10. 41589601
  11. 116281
  12. 247009
  13. 990025
  14. 715716
  15. 169744
  16. 64516
  17. 52287361
  18. 974169
  19. 403225
  20. 205209
  21. 14884
  22. 235225
  23. 756900
  24. 74132100
  25. 71289
  26. 259081
  27. 504100
  28. 430336
  29. 990025
  30. 28900
  31. 25816561
  32. 26896
  33. 438244
  34. 9878449
  35. 319225
  36. 831744
  37. 93636
  38. 14190289
  39. 36100
  40. 74011609

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