Jane Street Interview Question

Sum the even numbers in the range 1-100.

Interview Answers

Anonymous

Jun 25, 2014

Only question I remember. Basically the easiest kind of question you'll be asked.

Anonymous

Oct 4, 2014

Sum of first n natural numbers is known. Difference between sum of first n even and first n odd natural numbers is n. This gives a simple linear equation in one variable. Answer is 2550. Is there a shorter approach?