Bunuel wrote:
The figure above is formed by two overlapping squares, each having sides of 6 centimeters in length. If P and Q are the midpoints of the intersecting sides, what is the area, in square centimeters, of the enclosed region?
(A) 72
(B) 63
(C) 60
(D) 54
(E) 45
[Reveal] Spoiler:
The total area of the two squares is 36 + 36 = 72 (if they aren’t overlapping).
The area of the overlap is 3 x 3 = 9.
Thus,
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