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
A) 108  B) 120  C) 132  D) 144  E) 156
Two two-digit positive integers have the same digits but in reverse order   So they must be in the form 10x+y and 10y+x   Adding both of them will give us 11x+11y -----------&gt; 11(x+y) -----------&gt; that means 11 is the factor of sum   Among the answer choices only 132(choice 132) has 11 as its factor and it is the possible sum of two integers A and B   ANSWER:132
<result>C</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 ?