Intro: - There are two doors. One will lead to a hell and the other will lead to heaven. You want to go to the Door leading to Heaven. Question: - One guard tells lies and the other guard tells the truth. You can ask any guard 1 question or less but you don't know which one tells the truth or which one tells lies. What should you say?
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Answering this is pretty easy. Example 1: If the door to heaven is on the left side and you ask the person telling lies, then he would say the other person would say it is on the right side. This is because the person telling the truth would say on the left side but the person you are asking tells lies so he would say on the right side. Then you go to the left side because that is the opposite of what he says. Example 2: If again the door to heaven is on the left side but this time you are talking to the guard that tells the truth, he is going to say on the right side too. This is because he knows the other guard lies so he says actually what the lieing guard would say. The you also go to the left side because that is the opposite of what he says. Example 3: If this time the door to heaven is on the right side, and you asked the person that tells lies, he would say the left side since the truth teller guard will say the right side but then the lieing guard will say the left side since he lies. Then go on the right side because that is the opposite of what he says. Example 4: If again the door to heaven is on the right side but this time you are talking to the guard that tells the truth, he is going to say on the left side too. This is because he knows the other guard lies so he says actually what the lieing guard would say. The you also go to the right side because that is the opposite of what he says. Reason why other choices don't work: Choices other than "i need more questions" or "This is impossible" are wrong since they give you only 50% chance of going to heaven. Choices: "i need more questions" and "This is impossible" are wrong since i solved it and i only needed to ask 1 question