GRE Exam Numerical Ability Time Distance and Speed

If Tony goes y miles in x hours, how many miles does he go per minute, in terms of x and y?
A. 60x/y B. y/60x C. 60y/x D. x/60y E. 60xy

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GRE Other Question

There are how many hours between x minutes past 12 noon and 8:10 p.m. of the same day, where x < 60 ? A positive integer is called "square-Free" if it has no factor that is the square of an integer greater than 1. If n is an even square-free integer, which of the following must also be square free?

A. n/2
B. 2n
C. n+2
D. n²