Answer:
300
Step-by-step explanation:
The first (and last) digit can be any of {2, 4, 6}. The 2nd and 3rd digits can be any from 00 to 99. The 4th digit is the same as the 2nd, and the 5th digit is the same as the first.
There are 3·10·10 = 300 possible even palindromes in the given range.
