The Quest for 700: Weekly GMAT Challenge

Each week Manhattan GMAT posts a 700 level GMAT question on our blog and follows up with the answer the next day. Are you up for the challenge?

If 2^x + 2^y = x² + y², where x and y are nonnegative integers, what is the greatest possible value of |x – y|?

(A) 0

(B) 1

(C) 2

(D) 3

(E) 4