If m and n are integers, is m odd?
(1) n + m is odd.
(2) n + m = n2 + 5
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
【陷阱,一定要思考B单独是否正确】简单变形:n(n-1)=m-5 n(n-1)为偶数,所以m=5+even , m为odd
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