Spade vs. banana plug

Here is an audiophile test question:

Some binding posts are described as 5-way binding posts.  What are the five ways to connect speaker wire that are being accommodated by these types of binding posts?

You pretty much got it, although bare wire whether through the hole or around the post count as one way.  The fifth is "double banana" plug.  The spacing between the red and black post is a standard distance, so a solid spacer could hold both banana jacks at the correct spacing to be inserted all at once (talk about the ultimate in lazy man convenience).