AB
+BA
___
202
In the addition problem above, A and B represent digits in two different two-digit numbers. What is the sum of A and B?  Answers.
A) 6 B) 8 C) 9 D) 20 E) 14

Rationale: two ways to do it . . 1 ) straight logic . . only 20 fits in . . d
Answer: D