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?
-
AK must be even
-
BK cannot be square
-
CK cannot be divisible by 13
-
DK must be divisible by 11
-
EIf M is even then K must be even
显示答案
正确答案: D