exam Maths Puzzle Numerical Ability

Let f(x)=4-x^ and g(x)=2-x. Find f(x)-g(x).

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A grain storage warehouse has a total of 30 bins. Some hold 20 tons of grain each, and the rest hold 15 tons each. How many of each type of bin are there if the capacity of the warehouse is 510 tons? In the figure below, ABM is an equilateral triangle and MCE is an isosceles triangle. Points B, M, and E are collinear and m<CME=30 degrees and m<ACM=30 degrees. If AC=36 inches, u