I am not used to StackExchange (I just stumbled upon the committing phase for this group because a friend of mine who knows I am a math fan told me about it), so I am not really sure which kind of questions should be made (at least from people in the private beta).
For example, I think that asking a question about Pick Theorem or Benford Law could be interesting, not for me since I already know the answer but for prospective readers. What should I do? Just write the question and let other people answer it? For me, writing question and answer, besides being a bit of cheating, seems to be useless.