How many palindrome are there?

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section9.1: Sequences And Their Notations
Problem 3SE: Is the ordered set of even numbers an infinite sequence? What about the ordered set of odd numbers?...
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A palindrome is a sequence of 9 numbers that read identically from left to right and from right to left.  For example, 555555555 and 123454321 are palindromes but 123456789 is not. How many palindrome are there? 

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