exam Maths Puzzle Numerical Ability

Four 6-by-6 squares are drawn on a rhombus having two 30 degree angles. Find the area of the fifth square that is formed by connecting the centers of the squares.

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exam Other Question

Find the length of a simple interest loan with P=$640, r=8.5%, and I=$95.20. Could you please help me solve this problem: Test y = [ 1 / x ] for symmetry about the x-axis, the y-axis, and the origin.

Thanks for your help.