book Maths Puzzle Numerical Ability

5x(2+7)+2
10x+35x+2
25x+2

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book Other Question

The sum of two numbers is 21. When the larger number is subtracted from four times the smaller number, the difference is 4. What are the two numbers? The base of a triangle is (c+2) ft and the area is (2c*c-8) ft*ft. What is the height?