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 a positive integer greater than 1, what is the sum of the multiples of x from x to x2, inclusive?
(A) x(x + 1)(x – 1)
(B) x2(x + 1)/2
(C) x2(x – 1)
(D) (x3 + 2x)/2
(E) x(x – 1)2