Palindrome
Palindromes are numbers that reads the same forward as it does backward. For example, are both palindromes. Related Problems:
2014 AMC 12 Problem 15: http://www.artofproblemsolving.com/wiki/index.php?title=2014_AMC_12A_Problems/Problem_15
2013 AMC 12 Problem 22: http://www.artofproblemsolving.com/wiki/index.php/2013_AMC_12A_Problems/Problem_22
2010 AMC 12 Problem 11: http://www.artofproblemsolving.com/wiki/index.php/2010_AMC_12B_Problems/Problem_11