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A and B are integers. The expression (A+1)(B+1) is even.
What can be said about A and B?
A. They are both even numbers.
B. At least one of them is even.
C. At least one of them is odd.
D. They are both odd.
E. Nothing can be said surly on A and B.
Correct Answer: C
Explanation/Reference:
Explanation:
Because the given expression is even, at least one of the phrases in one of the parenthesis must be even therefore either A or B must be odd.
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