logon to admin mode and check the title, name of tab in your browser. you could also logon to admin and go to plugins or in swedish, modulhantering, in tools section, look for EPiServer and you will se the version.
Yes you are right
Another option could be login to edit or admin press the Help button (?) next the username on the top right corner. And click CMS in it. It will open new window(Web Help Window).Then we can find which version in the URL of a Web Help Window. And from version 7 onwards we can find in that too in Web Help Window bottom something like this Version: EPiServer 7.1 CMS | Last updated: 2013-06-05 | Copyright © EPiServer AB |Send feedback to us
I know my customer is running epi 5. But where do I find the exact version?