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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 819 · 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. 1.7869² =
  2. 2.732² =
  3. 3.900² =
  4. 4.341² =
  5. 5.470² =
  6. 6.170² =
  7. 7.540² =
  8. 8.7830² =
  9. 9.627² =
  10. 10.349² =
  11. 11.489² =
  12. 12.276² =
  13. 13.192² =
  14. 14.235² =
  15. 15.4635² =
  16. 16.1505² =
  17. 17.482² =
  18. 18.339² =
  19. 19.3060² =
  20. 20.626² =
  21. 21.282² =
  22. 22.3682² =
  23. 23.360² =
  24. 24.361² =
  25. 25.461² =
  26. 26.274² =
  27. 27.286² =
  28. 28.694² =
  29. 29.150² =
  30. 30.665² =
  31. 31.701² =
  32. 32.5571² =
  33. 33.779² =
  34. 34.264² =
  35. 35.353² =
  36. 36.6046² =
  37. 37.3707² =
  38. 38.722² =
  39. 39.9371² =
  40. 40.115² =

Answer key

  1. 61921161
  2. 535824
  3. 810000
  4. 116281
  5. 220900
  6. 28900
  7. 291600
  8. 61308900
  9. 393129
  10. 121801
  11. 239121
  12. 76176
  13. 36864
  14. 55225
  15. 21483225
  16. 2265025
  17. 232324
  18. 114921
  19. 9363600
  20. 391876
  21. 79524
  22. 13557124
  23. 129600
  24. 130321
  25. 212521
  26. 75076
  27. 81796
  28. 481636
  29. 22500
  30. 442225
  31. 491401
  32. 31036041
  33. 606841
  34. 69696
  35. 124609
  36. 36554116
  37. 13741849
  38. 521284
  39. 87815641
  40. 13225

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