Question 27 - Quantitative Practice Test for the GMAT

Which of the following statements must be false if \(x\) and \(y\) are prime numbers greater than \(2\) and are both factors of \(84\)?

I) \(x + y\) is even

II) \(y^2 + xy\) is a multiple of \(10\)

III) \((x+y)^{-2}\) is negative

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