I used to like brain teasers when I was younger. I chanced upon this on Facebook today and I found it really fun and challenging. Do you know the answer?
You are in a room with two doors – one leads to heaven and the other to hell. Each door is protected by a single guard. One of the guards always lies and one of them always tells the truth.
What is the one question you can ask to ensure you will know which door goes to heaven?
I’ll post the answer in the comments, so don’t worry if your brain is fried (like mine).