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If \(x\) and \(y\) are positive integers, what is the remainder when \(xy\) is divided by \(4?\)
(1) \(x + y = xy.\)
(2) \((x - 1)(y - 1)\) is odd.
Answer: D
Source: Manhattan GMAT
(1) \(x + y = xy.\)
(2) \((x - 1)(y - 1)\) is odd.
Answer: D
Source: Manhattan GMAT