book Maths Puzzle Numerical Ability

please explain how to evaluate this type of problem.
(5+3)/2+2 The answer choices are 2,4,6,8

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book Other Question

solve.

110. Area of a window. A window is in the shape of a square of side s, with a semicirlce of diameter s above it. Write a function that expresses the total area of the window as a function of s. use the quadratic formula to slove 2xsquard-5x=2=0