Jane Street interview question

What is 38 squared?

Interview Answers

Anonymous

21 Dec 2011

If it's meant to be done mentally, it might be best to think of it as 38*38 = (40-2)*(40-2) = 1600 - 2*80 + 4 = 1444 or something along those lines..

6

Anonymous

15 Dec 2011

1444