1. Check from Admin Area :
- Login to WordPress dashboard.
- Go to Settings and you will see the current WordPress version in the bottom-right corner.
2. Check from cPanel :
- Log in to your cPanel account.
- Go inside File Manager and then WordPress installation directory and then go inside the wp-includes directory.
- Find the version.php file and open it by clicking over the Edit button.
- There you can clearly see the current WordPress version.
Check out the blog to read in detailed procedure.