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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 689 · 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. 1.453² =
  2. 2.702² =
  3. 3.890² =
  4. 4.809² =
  5. 5.327² =
  6. 6.610² =
  7. 7.4989² =
  8. 8.752² =
  9. 9.788² =
  10. 10.189² =
  11. 11.885² =
  12. 12.449² =
  13. 13.338² =
  14. 14.324² =
  15. 15.668² =
  16. 16.344² =
  17. 17.4613² =
  18. 18.1662² =
  19. 19.133² =
  20. 20.960² =
  21. 21.773² =
  22. 22.236² =
  23. 23.7243² =
  24. 24.780² =
  25. 25.807² =
  26. 26.684² =
  27. 27.316² =
  28. 28.720² =
  29. 29.8893² =
  30. 30.599² =
  31. 31.621² =
  32. 32.531² =
  33. 33.929² =
  34. 34.544² =
  35. 35.895² =
  36. 36.7828² =
  37. 37.800² =
  38. 38.793² =
  39. 39.9797² =
  40. 40.9162² =

Answer key

  1. 205209
  2. 492804
  3. 792100
  4. 654481
  5. 106929
  6. 372100
  7. 24890121
  8. 565504
  9. 620944
  10. 35721
  11. 783225
  12. 201601
  13. 114244
  14. 104976
  15. 446224
  16. 118336
  17. 21279769
  18. 2762244
  19. 17689
  20. 921600
  21. 597529
  22. 55696
  23. 52461049
  24. 608400
  25. 651249
  26. 467856
  27. 99856
  28. 518400
  29. 79085449
  30. 358801
  31. 385641
  32. 281961
  33. 863041
  34. 295936
  35. 801025
  36. 61277584
  37. 640000
  38. 628849
  39. 95981209
  40. 83942244

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