#183
One day, you were going to a world famous Casino"Old World" which is 200 miles away from your home. You didn't know the route and driving by using GPS. In the meantime, you got one point, where the road bifurcated and you were not able to decide in which direction you go(as your phone died).
There you met two friends. Among them, one always speaks the truth and other one always lies. When you asked the way from them, they allowed you to ask only one question.
So, what question did you ask from them to be assured of the right direction and from who you'd ask the question ?
Difficulty Level - 2/5
One day, you were going to a world famous Casino"Old World" which is 200 miles away from your home. You didn't know the route and driving by using GPS. In the meantime, you got one point, where the road bifurcated and you were not able to decide in which direction you go(as your phone died).
There you met two friends. Among them, one always speaks the truth and other one always lies. When you asked the way from them, they allowed you to ask only one question.
So, what question did you ask from them to be assured of the right direction and from who you'd ask the question ?
Difficulty Level - 2/5
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Solution :
You ask either of the friends "If I asked your friend which path to take to get to the world famous Casino"Old World", which way would he tell me to go?" And then I would take the opposite path of the one I'm told. Because:
1) If I'm talking to the truth telling friend, then he will tell me what his friend would say, which would be a lie. So the direction indicated would be wrong.
2) If I'm talking to the lying friend, then he would lie about what his friend would say, which would be the truth. So the lying friend would still indicate the wrong path.
Solution :
You ask either of the friends "If I asked your friend which path to take to get to the world famous Casino"Old World", which way would he tell me to go?" And then I would take the opposite path of the one I'm told. Because:
1) If I'm talking to the truth telling friend, then he will tell me what his friend would say, which would be a lie. So the direction indicated would be wrong.
2) If I'm talking to the lying friend, then he would lie about what his friend would say, which would be the truth. So the lying friend would still indicate the wrong path.
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