Check What Version of WordPress You Are Running
Updated: October 25, 2013
The version number of the currently installed version of WordPress is listed in several places.
In the root directory of the WordPress installation the readme.html lists the version number.
In the admin interface of WordPress you can see what version you are running from the dashboard, in most versions it is at the bottom of the page, and in newer versions it will also indicate if there is a new version available.
In the source code of the website's pages the version number is listed in the following line:
<meta name="generator" content="WordPress ">
Current Version of WordPress