This is the first one and I'm gonna try and give a softball question but they will be getting harder.
The only rule is don't google/use any other search engine please. What's the fun in that? On with it.
Texas Hold'Em - We all know that every straight has either a 10 or a 5 in it. So what is the only straight you can't make in a Hold'Em game while holding 10 5 as hole cards (your two cards only you can see)?
I would like to see what you come up with. Enjoy it, haha.