Many a time, you might get curious on knowing what is the version of Joomla one's website is. Well the meta tag 'generator' gives the answer,but some disable it ( yes! it can be done). And moreover It only tells you about the version like "Joomla 1.7 ...... ...". It doesn't tell you the exact version.

Here is one solution, If  a site running Joomla 1.6 or above just do the request from your browser like.

http://<sitename>/joomla.xml.

That is it.Look for the version tag in the xml shown in the browser. Voila.