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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 690 · 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. 1.804² =
  2. 2.728² =
  3. 3.545² =
  4. 4.7287² =
  5. 5.231² =
  6. 6.6745² =
  7. 7.3740² =
  8. 8.351² =
  9. 9.829² =
  10. 10.132² =
  11. 11.542² =
  12. 12.686² =
  13. 13.985² =
  14. 14.612² =
  15. 15.301² =
  16. 16.446² =
  17. 17.652² =
  18. 18.390² =
  19. 19.4213² =
  20. 20.986² =
  21. 21.7343² =
  22. 22.695² =
  23. 23.409² =
  24. 24.628² =
  25. 25.2153² =
  26. 26.344² =
  27. 27.541² =
  28. 28.603² =
  29. 29.1928² =
  30. 30.610² =
  31. 31.9206² =
  32. 32.481² =
  33. 33.6909² =
  34. 34.789² =
  35. 35.4900² =
  36. 36.6168² =
  37. 37.3913² =
  38. 38.426² =
  39. 39.8638² =
  40. 40.824² =

Answer key

  1. 646416
  2. 529984
  3. 297025
  4. 53100369
  5. 53361
  6. 45495025
  7. 13987600
  8. 123201
  9. 687241
  10. 17424
  11. 293764
  12. 470596
  13. 970225
  14. 374544
  15. 90601
  16. 198916
  17. 425104
  18. 152100
  19. 17749369
  20. 972196
  21. 53919649
  22. 483025
  23. 167281
  24. 394384
  25. 4635409
  26. 118336
  27. 292681
  28. 363609
  29. 3717184
  30. 372100
  31. 84750436
  32. 231361
  33. 47734281
  34. 622521
  35. 24010000
  36. 38044224
  37. 15311569
  38. 181476
  39. 74615044
  40. 678976

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