HTaccess how to redirect multiple URLs?

HTaccess how to redirect multiple URLs?

I want to redirect multiple URLs to the same page.
I could do it this way:
Redirect /index.html http://example.com/newdirectory/
Redirect /index1.html http://example.com/newdirectory/
Redirect /index2.html http://example.com/newdirectory/
Redirect /index3.html http://example.com/newdirectory/
Redirect /index4.html http://example.com/newdirectory/
Redirect /index5.html http://example.com/newdirectory/
Is there not a better method for doing this? (more clean)