If your backup has come from a 10.50.x version that's SQL 2008R2. So you'll only be able to restore that on 2008R2 instance or later (2012).
If you only need the structure of the database, i.e. not the data, then you could generate scripts from the 10.50.x instance to create the objects on the older 10.0.x instance.
Hope that helps somewhat.
Simon