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A tailor trims 4 feet form opposite edges of a square piece of cloth [#permalink]
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The stimulus info yields: (x-10) (x-8) = 120. Before expanding, notice that the factors have a difference of 2, i.e. only 10 x 12 = 120 works. (This saves you at least 45 sec). Now pick a factor, say 10. Original side is either 10 + 8 = 18 (not given) or 10 + 10 = 20 (choice B).
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Re: A tailor trims 4 feet from opposite edges of a square piece [#permalink]
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Re: A tailor trims 4 feet from opposite edges of a square piece [#permalink]
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