hard · GMAT Quant
Let m and n be non-zero integers such that m^2 n < 0 and m n^2 equiv 2 pmod4.
Which of the following statements must be true?
- m + 2n is divisible by 4.
- m + n is an even integer.
- m n is a negative odd integer.
- m - n is divisible by 4.
- m is a negative integer.
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