题目信息
M is a positive two-digit number. When the digits are reversed, the number is N. If K = M + N, which of the following is true?
A:K must be even
B:K cannot be square
C:K cannot be divisible by 13
D:K must be divisible by 11
E:If M is even then K must be even
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已选答案：
正确答案：
D:K must be divisible by 11
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