AB
+BA
___
161
In the addition problem above, A and B represent digits in two different two-digit numbers. What is the sum of A and B?  Choose the correct choice
A) 6
B) 13
C) 9
D) 11
E) 14
two ways to do it..   1) straight logic..   we can see that ones digit is 1 when units digit B and A are added..   only 13 fits in..   13
<result>B</result>
AB
+BA
___
161
In the addition problem above, A and B represent digits in two different two-digit numbers. What is the sum of A and B?