Any, and every, number can be transformed into a palindrome.
90
There are 90 such numbers.
There is no limit to numbers, thus there is no limit to palindrome numbers.
90
There are 90 four-digit palindromes
There is 90 four digit palindromes.
There is: 101,111,121,131,141,151,161,171,181,191 202,212,222,etc... 999 There are 90 palindromic 3 digit numbers
899100 of them. Only 900 of the 900000 are palindromic.
1221, 2112, 3003, 10401, 11211, 12021
There are no four-digit perfect squares that are palindromes.
-1000
90000. With 10 digit palindromes, the last 5 digits are the same as the first 5 digits in reverse, eg 12345 54321. So it comes down to how many 5 digit numbers are there? They are the numbers "10000" to "99999", a total of 99999 - 10000 + 1 = 90000.