exam Maths Puzzle Numerical Ability

If n is any negative number, which of the following must be positive?

(A) n/2
(B) 2n
(C) n + 2
(D) n - 2
(E) 2 - n

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exam Other Question

x over x-5 + 3 over 5-x=2 An objective function is to be maximized given the following constraints: x + 2y<- 4, x - y <-1, x >- 0, y >- 0. Find the vertices of the set of feasible solutions.