The number 121 is a palindrome, because it reads the same backwards as forward. How many integer palindromes are between 100 and 500?
+14 The integer is between 100 and 500, and the hundreds and ones digit have to be the same. The hundreds digit and the ones digit have the numbers 1-4 to choose from.
The tens digit can be any number from 0-9, which means it has 10 numbers to choose from.
4*10 = 40 integer palindromes.
