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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 240 · 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. 1.833² =
  2. 2.112² =
  3. 3.197² =
  4. 4.6333² =
  5. 5.303² =
  6. 6.587² =
  7. 7.200² =
  8. 8.670² =
  9. 9.122² =
  10. 10.636² =
  11. 11.271² =
  12. 12.954² =
  13. 13.747² =
  14. 14.228² =
  15. 15.6548² =
  16. 16.278² =
  17. 17.270² =
  18. 18.6535² =
  19. 19.239² =
  20. 20.864² =
  21. 21.685² =
  22. 22.4025² =
  23. 23.534² =
  24. 24.305² =
  25. 25.253² =
  26. 26.125² =
  27. 27.244² =
  28. 28.9447² =
  29. 29.865² =
  30. 30.444² =
  31. 31.199² =
  32. 32.968² =
  33. 33.484² =
  34. 34.483² =
  35. 35.1906² =
  36. 36.145² =
  37. 37.621² =
  38. 38.545² =
  39. 39.857² =
  40. 40.9211² =

Answer key

  1. 693889
  2. 12544
  3. 38809
  4. 40106889
  5. 91809
  6. 344569
  7. 40000
  8. 448900
  9. 14884
  10. 404496
  11. 73441
  12. 910116
  13. 558009
  14. 51984
  15. 42876304
  16. 77284
  17. 72900
  18. 42706225
  19. 57121
  20. 746496
  21. 469225
  22. 16200625
  23. 285156
  24. 93025
  25. 64009
  26. 15625
  27. 59536
  28. 89245809
  29. 748225
  30. 197136
  31. 39601
  32. 937024
  33. 234256
  34. 233289
  35. 3632836
  36. 21025
  37. 385641
  38. 297025
  39. 734449
  40. 84842521

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