Here are two quizzes about lying. See if you can solve it.
A stranger who comes to a junction in the road could not decide which one to take. A smiling townsman stands there. What one question can the stranger ask, to be answered yes or no, that will ensure him to get the right direction to the town, whether the townsman is a liar or not?
A says B lies. B says C lies. C says A and B lie. Which one is telling the truth?