You are ill and travelling down a road to the hospital.
You reach a fork in the road and find a pair of identical twin boys standing there.
One of the twins always tells the truth and the other twin always lies.
You are allowed to direct only one question to one of the twins, and as such you will be assured of the correct road to the hospital.
What is your question and to whom?
This one is becoming a classic brain teaser.
You ask either of the twins: “If I asked your twin which path to take to get to the hospital, which way would he tell me to go?”
And then I would go in the opposite path of the one I’m told.
- If I’m talking to the truth telling twin, then he will tell me what his twin would say, which would be a lie. So the direction indicated would be wrong.
- If I’m talking to the lying twin, then he would lie about what his twin would say, which would be the truth. So the lying twin would still indicate the wrong path