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

How would you perform the indicated operations?

2 over the square root 8-3 over the square root of 50
the variables x and y vary directly.use the given values to write an equation that relates x and y

x=5,y=40

i have no clue how to do it