IM ALWAYS WITH YOU I CAN BE ALL THE HELP YOU NEED OR YOUR GRE RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

This is a logic question and can be answered if one realizes that the TRUTH of a LIE is a LIE, and the LIE of a TRUTH is a LIE. You need one guard to give you the other guards answer. Knowing this one could ask a question like, If I were to ask the other guard which door leads to freedom, what would he say?

If you ask the guard who always tells the truth, he would tell you the other guard would point you to the door of death. If you ask the guard who always lies, he would tell you the opposite door of the truth-telling guard and point you to the door of death. In either case, both guards will point to the door of death so you should choose the other one. Did you answer this riddle correctly?
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Your heart. Did you answer this riddle correctly?
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An onion Did you answer this riddle correctly?
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An apple Did you answer this riddle correctly?
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A Christmas tree Did you answer this riddle correctly?
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A rainbow Did you answer this riddle correctly?
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A snake with a lisp! Did you answer this riddle correctly?
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A snake charmer! Did you answer this riddle correctly?
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A compass Did you answer this riddle correctly?
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Crayons Did you answer this riddle correctly?
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The turkey! Did you answer this riddle correctly?
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Loch Jaws Did you answer this riddle correctly?
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I don't know...but I wouldn't want to milk it! Did you answer this riddle correctly?
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Slow swimmers. Did you answer this riddle correctly?
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A dentist. Did you answer this riddle correctly?
YES  NO