Hi MHF

Here's my question:

There are 90 four-digit palindromic numbers.

How many of these four-digit palindromic numbers are divisible by 7.

So i have no idea how to start or what to do, i'm unable to obtain a pattern of any sort, i assume there are 10 palindromes between each thousand number bracket (1000-1999, 2000-2999 etc)