Consider the following two questions:
Question #1: If 10 is the greatest common divisor of positive integers x and y, and 20 is the lowest common multiple of x and y, what is the value of xy?
A) 15
B) 20 C) 30
D) 100
E) 200
Question #2...

by Patti Conner
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The following is a metaphor for how students often respond to a particularly tough GMAT question:
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