A palindrome is a number that reads the same forward and backward, such as 242. How many even thirteen-digit numbers are palindromes?	Pick one.
A) 40	B) 400	C) 500	D) 5,000	E) 40,000,000
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 thirteen-digit could be 0-9 ( 10 ways), e.g 2222225222222, 2864228224682   The 2nd and fourth numbers , the 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*10= 4000000.40,000,000
<result>E</result>
A palindrome is a number that reads the same forward and backward, such as 242. How many even thirteen-digit numbers are palindromes?