Problem: Find the sum of the digits of the largest even three digit number (in base ten representation) which is not changed when its unit's and hundred's digits are interchanged.
Answer Choices:
A.
B.
C.
D.
E.
Solution:
The numbers whose unit's and hundred's digits are equal are the ones not changed when these digits are interchanged. The largest such even three digit number is . The sum of the digits is .