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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 720 · 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. 1.6203² =
  2. 2.120² =
  3. 3.744² =
  4. 4.511² =
  5. 5.164² =
  6. 6.1446² =
  7. 7.4498² =
  8. 8.211² =
  9. 9.675² =
  10. 10.340² =
  11. 11.153² =
  12. 12.510² =
  13. 13.684² =
  14. 14.753² =
  15. 15.710² =
  16. 16.836² =
  17. 17.2635² =
  18. 18.757² =
  19. 19.477² =
  20. 20.254² =
  21. 21.255² =
  22. 22.954² =
  23. 23.905² =
  24. 24.5628² =
  25. 25.595² =
  26. 26.850² =
  27. 27.605² =
  28. 28.853² =
  29. 29.597² =
  30. 30.212² =
  31. 31.199² =
  32. 32.662² =
  33. 33.196² =
  34. 34.1464² =
  35. 35.2220² =
  36. 36.108² =
  37. 37.378² =
  38. 38.145² =
  39. 39.244² =
  40. 40.448² =

Answer key

  1. 38477209
  2. 14400
  3. 553536
  4. 261121
  5. 26896
  6. 2090916
  7. 20232004
  8. 44521
  9. 455625
  10. 115600
  11. 23409
  12. 260100
  13. 467856
  14. 567009
  15. 504100
  16. 698896
  17. 6943225
  18. 573049
  19. 227529
  20. 64516
  21. 65025
  22. 910116
  23. 819025
  24. 31674384
  25. 354025
  26. 722500
  27. 366025
  28. 727609
  29. 356409
  30. 44944
  31. 39601
  32. 438244
  33. 38416
  34. 2143296
  35. 4928400
  36. 11664
  37. 142884
  38. 21025
  39. 59536
  40. 200704

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