exam Maths Puzzle Numerical Ability

i have to find the total area of a cube with edge 4.

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exam Other Question

No textbook, came from a worksheet

A. Slope = -2, through (2,3)

B. m = -2/3, throught (-3,2)

C. through (6,3) and (5,4) how do you do partial fraction decomposition?? Like on a problem such as: 1/(x^2+x)???