Question published, but address not found

I take it when a question is asked, admin can select any category existing for it to be published. It does not need its own category? When answerd in admin, the question URL returne a 404

ie

http://mysite.com/question/how-many-dogs-in-the-pound/ returns a 404

does it need a special category or what?

would appreciate any help on this…

Thank-you.

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