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Squares of 3 Digit Numbers Worksheet

Vedic maths trick 26: Squares of 3- and 4-digit numbers · Set 790 · 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. 1.900² =
  2. 2.413² =
  3. 3.841² =
  4. 4.663² =
  5. 5.887² =
  6. 6.4021² =
  7. 7.759² =
  8. 8.380² =
  9. 9.642² =
  10. 10.183² =
  11. 11.673² =
  12. 12.411² =
  13. 13.138² =
  14. 14.318² =
  15. 15.118² =
  16. 16.939² =
  17. 17.1461² =
  18. 18.554² =
  19. 19.7593² =
  20. 20.533² =
  21. 21.379² =
  22. 22.1515² =
  23. 23.580² =
  24. 24.585² =
  25. 25.6304² =
  26. 26.1266² =
  27. 27.1669² =
  28. 28.557² =
  29. 29.184² =
  30. 30.924² =
  31. 31.967² =
  32. 32.153² =
  33. 33.773² =
  34. 34.202² =
  35. 35.737² =
  36. 36.125² =
  37. 37.9000² =
  38. 38.498² =
  39. 39.877² =
  40. 40.1343² =

Answer key

  1. 810000
  2. 170569
  3. 707281
  4. 439569
  5. 786769
  6. 16168441
  7. 576081
  8. 144400
  9. 412164
  10. 33489
  11. 452929
  12. 168921
  13. 19044
  14. 101124
  15. 13924
  16. 881721
  17. 2134521
  18. 306916
  19. 57653649
  20. 284089
  21. 143641
  22. 2295225
  23. 336400
  24. 342225
  25. 39740416
  26. 1602756
  27. 2785561
  28. 310249
  29. 33856
  30. 853776
  31. 935089
  32. 23409
  33. 597529
  34. 40804
  35. 543169
  36. 15625
  37. 81000000
  38. 248004
  39. 769129
  40. 1803649

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