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 nm leaves a remainder of 1 after division by 7 for all positive integers n that are not multiples of 7, then m could be equal to
(A) 2
(B) 3
(C) 4
(D) 5
(E) 6
