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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 684 · 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. 1.1406² =
  2. 2.609² =
  3. 3.852² =
  4. 4.234² =
  5. 5.205² =
  6. 6.353² =
  7. 7.421² =
  8. 8.342² =
  9. 9.162² =
  10. 10.468² =
  11. 11.1690² =
  12. 12.867² =
  13. 13.238² =
  14. 14.8074² =
  15. 15.261² =
  16. 16.307² =
  17. 17.850² =
  18. 18.220² =
  19. 19.587² =
  20. 20.210² =
  21. 21.105² =
  22. 22.650² =
  23. 23.906² =
  24. 24.767² =
  25. 25.1507² =
  26. 26.489² =
  27. 27.833² =
  28. 28.872² =
  29. 29.464² =
  30. 30.525² =
  31. 31.2862² =
  32. 32.2884² =
  33. 33.310² =
  34. 34.428² =
  35. 35.2698² =
  36. 36.748² =
  37. 37.211² =
  38. 38.6585² =
  39. 39.734² =
  40. 40.8290² =

Answer key

  1. 1976836
  2. 370881
  3. 725904
  4. 54756
  5. 42025
  6. 124609
  7. 177241
  8. 116964
  9. 26244
  10. 219024
  11. 2856100
  12. 751689
  13. 56644
  14. 65189476
  15. 68121
  16. 94249
  17. 722500
  18. 48400
  19. 344569
  20. 44100
  21. 11025
  22. 422500
  23. 820836
  24. 588289
  25. 2271049
  26. 239121
  27. 693889
  28. 760384
  29. 215296
  30. 275625
  31. 8191044
  32. 8317456
  33. 96100
  34. 183184
  35. 7279204
  36. 559504
  37. 44521
  38. 43362225
  39. 538756
  40. 68724100

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