Each week Manhattan GMAT posts a GMAT question on our blog and follows up with the answer the next day. Are you up for the challenge?
If x is the reciprocal of a positive integer, then the maximum value of xy, where y = –x2, is achieved when x is the reciprocal of
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
