hard · GMAT Quant
Let x and y be nonzero integers with x^2 y<0, x y^2equiv 4pmod8, and x+y<0.
Which statement must be true?
- x + y is an odd integer.
- x and y are both even integers.
- x and y are both positive integers.
- x y > 0
- x + y is divisible by 4.
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