10、A, B, C are guessing a two-digit number
A says: It has an even number of factors, and it is greater than 50
B says: It is an odd number, and it is greater than 60
C says: It is an even number, and it is greater than 70

If each of them is only half right, then the number is
【Answer】64
Analysis: From what Yi and Bing said, one is odd and the other is even, so one must be true and the other false. If this number is greater than 70, it must also be greater than 60, so the latter part can only mean that this number is greater than 60 and less than 70, so this number is even; since this number is greater than 60, what Jia said about it being greater than 50 is correct, so the number of factors of this number is an odd number, and it must be an even perfect square number between 50 and 70, which is only 64.