There are 90.
Palindromic numbers in the range 100-999 have the form 'aba' with 'a at least 1, so for the two digits 'ab' there are the numbers 10-99; a total of 90.
There are 90 palindromic numbers between 100 and 1000
There are 900000 of them.
90
9
10
There are 90 palindromic numbers.
There are 90 palindromic numbers between 100 and 1000
infinite
There are not just 13 non-palindromic numbers. Most numbers are non-palindromic.
There are 900000 of them.
90
9
1089
10
1089
Twenty.
including 2000 it's 1001000