Riddle: you are going along a road to saltlake city and see at the end of the it that there are two men and two roads .one of the men is a liar (he is standing next to the wrong road). and one of them is telling the truth(he is standing next to the right road)what question do you ask both of them. it has to the same question and you are ony aloud to ask one question.
Answer: you would ask both of them "what coulor are your eyes"the liar would say that his eyes were a diffrent coulor that they actually were. the person who was telling the truth would say the correct coulor of his eyes so you would know which path is which