Jane Street interview question

What's 26*27?

Interview Answers

Anonymous

28 Feb 2012

(25+1)*(25+2)=625+75+2=702

3

Anonymous

22 June 2011

702

1

Anonymous

23 Nov 2012

26*27=27^2-27=3^6-27=729-27=702

Anonymous

15 Sept 2012

26*27=(26-3)*30+12=690+12=702