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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 721 · 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. 1.931² =
  2. 2.2117² =
  3. 3.649² =
  4. 4.441² =
  5. 5.9050² =
  6. 6.4987² =
  7. 7.160² =
  8. 8.5805² =
  9. 9.9716² =
  10. 10.585² =
  11. 11.698² =
  12. 12.653² =
  13. 13.240² =
  14. 14.351² =
  15. 15.6577² =
  16. 16.5241² =
  17. 17.228² =
  18. 18.813² =
  19. 19.785² =
  20. 20.8220² =
  21. 21.223² =
  22. 22.1396² =
  23. 23.616² =
  24. 24.5906² =
  25. 25.5212² =
  26. 26.200² =
  27. 27.146² =
  28. 28.1430² =
  29. 29.637² =
  30. 30.266² =
  31. 31.842² =
  32. 32.885² =
  33. 33.974² =
  34. 34.6291² =
  35. 35.1192² =
  36. 36.706² =
  37. 37.721² =
  38. 38.806² =
  39. 39.159² =
  40. 40.894² =

Answer key

  1. 866761
  2. 4481689
  3. 421201
  4. 194481
  5. 81902500
  6. 24870169
  7. 25600
  8. 33698025
  9. 94400656
  10. 342225
  11. 487204
  12. 426409
  13. 57600
  14. 123201
  15. 43256929
  16. 27468081
  17. 51984
  18. 660969
  19. 616225
  20. 67568400
  21. 49729
  22. 1948816
  23. 379456
  24. 34880836
  25. 27164944
  26. 40000
  27. 21316
  28. 2044900
  29. 405769
  30. 70756
  31. 708964
  32. 783225
  33. 948676
  34. 39576681
  35. 1420864
  36. 498436
  37. 519841
  38. 649636
  39. 25281
  40. 799236

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