A palindrome is a number that reads the same forward and backward, such as 242. How many even eleven-digit numbers are palindromes? Choose the correct choice
A) 40  B) 400  C) 500  D) 5,000  E) 400,000
if the palindrome must be even, it must begin and end in 2,4 6 and 8 ( 4 ways) e.g 22122,44144.   The middle number in the eleven-digit could be 0-9 ( 10 ways), e.g 22522, 22822   The 2nd and fourth numbers , 3rd and 5th, 4th and 6th, 5th and 7th must also be same i.e 0-9( 10 ways)   we thus have, 4 *10*10*10*10*10* = 400000. 400,000
<result>E</result>
A palindrome is a number that reads the same forward and backward, such as 242. How many even eleven-digit numbers are palindromes?