两道IQ题。有兴趣来做做
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Quite simple:
Ask anyone of the two(let's say A):
Which way is the one to the Honest Country that he(B) would say?
If A is a lier, then B is honest. Then A will know that B will point out the right way. So, he will answer the question with a lie and point the wrong way.
If A is honest, then B is a lier. Then A will know that B will point out the wrong way. To tell the truth, A will say that the way B points out is not correct.
The tip to this question is that the question presented here combined the characteristics of 2 people. So, regardless the person you are asking, you will always get a answer opposites to the way to Honest Country.
Make sense?
Ask anyone of the two(let's say A):
Which way is the one to the Honest Country that he(B) would say?
If A is a lier, then B is honest. Then A will know that B will point out the right way. So, he will answer the question with a lie and point the wrong way.
If A is honest, then B is a lier. Then A will know that B will point out the wrong way. To tell the truth, A will say that the way B points out is not correct.
The tip to this question is that the question presented here combined the characteristics of 2 people. So, regardless the person you are asking, you will always get a answer opposites to the way to Honest Country.
Make sense?
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no, that would not be correct since the two parts produced by such a fold will not burn out simultaneously under most circumstances.
let`s just say the burning speed given in the question is in mass per minute (not in length per minute), then in order for both halves of the rope produce by such a fold, they must in turn have the same mass. It is mentioned in the problem that the mass distribution is not uniform within the rope and thus despite the fact that the two parts are same in length, they are not necessarily same in mass and thus will have different burn out time, be it burning from 1 end and both ends.
It is then obvious that since the two parts of the rope won`t even burn out at the same time, it would be impossible to determine an exact time of 15 minutes - although it must lie in the duration starting with the time the first part of the rope burn out and ending with the second part of the rope burning out.
