If \(n\) is a positive integer and \(r\) is the remainder when \(\dfrac{n - 1}{n + 1}\) is divided by \(24,\) what is the value of \(r?\)
(1) \(n\) is not divisible by \(2.\)
(2) \(n\) is not divisible by \(3.\)
Answer: C
Source: GMAT Prep
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