Can you give any example of riddles or puzzles in which the answers are someway "cleverly hidden" inside the question? I think that such examples are more common in word-related riddles, but maybe similar ones can be found also in numeric puzzles? Who knows?

I'm italian, and there's a very common riddle in italian language which says: "Nomina una parola qualunque contenente tre lettere U" (translated: "Name whatever word containing three 'U's "); the funny thing is that the italian word "QUALUNQUE" (a really really common word) is maybe one of the few actually containing three U letters...). That's what makes this riddle really clever and someway surprising when you reveal the answer...

So, do you know any example in english language?

(Sorry if this is not a real riddle, but I think it can be interesting discussing of this topic)