Question : Take this one. You have to ask a single question, whose answer will drive you to the answer of the main question!
You have been convicted for some heinous crime. It is your destiny to spend the rest of your life in jail. However one day you find that things are not so murky.
The jailor is a good man and respects intellegence. He gives a chance to all of the convicts to escape. But if one fails to escape, he meets his doom immediately!
Here is the situation. You are brought in a field. There are two doors. Only one will lead you to the outside world. There are two security guards, one at each door. You are allowed to ask one and only one question to only one of them. Wait, its not so easy. The critical thing is that one of them always speaks the truth and the other always lies. You don’t know who is who.
After you ask the question, it will be answered and then you have to make a choice.
What question should you ask so that you get out of the jail?
Answer : Sorry guys, I don’t know the solution. If you know it, post as comment here. I can update here.