Is it possible to open a lower version Inventor file to Higher version Inventor?

Yes It is Possible accoding to the file's extention.

yes, hight version more updated that lower so it is possible.

 I think it's possible according to the file's extention

Yes of course

Yes of course

Yes it is possible to open a lower version inventor to higher version ,but it depend on extention of file.

As in autocadd 2018 you can open file upto version 2004 and 2000 version.

Yes of course this is possible

Yes possible. Higher version having some improvments including the lower version.

Of course

Of course

Of course

Of course

yes we can open lower version file on higher version but can not open higher version in lower version inventor