If the two-digit integers A and B are positive and have the same digits, but in reverse order, which of the following could be the sum of A and B?  Choose the correct choice from the following choices:
A) 77
B) 78
C) 79
D) 80
E) 81
A two-digit number "cd" can be expressed algebraically as 10c+d.   The sum of A + B = (10c+d)+(10d+c)=11(c+d).   The only answer that is a multiple of 11 is 77.   The answer is 77.
<result>A</result>
If the two-digit integers A and B are positive and have the same digits, but in reverse order, which of the following could be the sum of A and B?