题目信息
If k and y are integers, and 10k + y is odd, which of the following must be true?
A:k is odd
B:k is even
C:y is odd
D:y is even
E:both k and y are odd
参考答案及共享解析

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已选答案:
正确答案:
C:y is odd
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题目来源
Manhattan