4. QI test, with a simple math calculus (maybe in a phrasal form "what
is the result of three plus for?")
I prefer this one too (without typos ;-), text to speak or blind
users will appreciate it too.
I'm afraid a bit of this one, because it is damn too easy to crack.. A simple grammar will generate the correct answer.
I think we can try it, but I bet it is cracked in one week or even less :)
I'm currently busy studying, but I can develop something until the end of the week (unless someone wants to send a patch :)
Nuno