exam Maths Puzzle Numerical Ability

graph the following equations and give the points

y=2x , y=2x+1

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exam Other Question

If the average (arithmetic mean) of x and y is k, which of the following is the average of x, y, and z?

(A) 2k + z/3
(B) 2k +z/2
(C) k+z/3
(D) k+z/2
(E) 2(k+z)/3 find two factors of 35 with a difference of 2