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Answer to Q131

You walk up to a mountain that has two paths. One leads to the other side of the mountain, and the other will get you lost forever. Two twins know the path that leads to the other side. You can ask them only one question each. Except, one lies and one tells the truth, and you don't know which is which.

So, what would you ask?

There are several ways to get the correct answer from the twins. One of the simplest way:

1. Ask both twins "If I ask your brother for the right path, where will he point to?"
2. Both twins will point to the same path, because the lying twin will want to lie to you and he knows his brother would point to the right path so he point to the wrong path and the truth-telling twins knows his brother will lie so he points to the wrong path too.
3. The path they both point to is the wrong path, take the other path.

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875 viewsedited  Feb 26, 2021 at 07:57

Answer to Q131

You walk up to a mountain that has two paths. One leads to the other side of the mountain, and the other will get you lost forever. Two twins know the path that leads to the other side. You can ask them only one question each. Except, one lies and one tells the truth, and you don't know which is which.

So, what would you ask?

There are several ways to get the correct answer from the twins. One of the simplest way:

1. Ask both twins "If I ask your brother for the right path, where will he point to?"
2. Both twins will point to the same path, because the lying twin will want to lie to you and he knows his brother would point to the right path so he point to the wrong path and the truth-telling twins knows his brother will lie so he points to the wrong path too.
3. The path they both point to is the wrong path, take the other path.

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