CANNOT BE SEEN CANNOT BE FELT CANNOT BE HEARD CANNOT BE SMELT IT LIES BEHIND STARS AND UNDER HILLS ANF EMPTY HOLES IF FILLS IT COMES OUT FIRST AND GOLLOWS AFTER ENDS LIFE KILLS LAUGHTER RI RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

Only one, it's no longer empty after the first Did you answer this riddle correctly?
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The road Did you answer this riddle correctly?
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The letter M Did you answer this riddle correctly?
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Post Office is the correct answer to this riddle

A post office is a public department that offers mail-related services such as letters, money orders, postage stamps, etc. Did you answer this riddle correctly?
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Entanglement Did you answer this riddle correctly?
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A Tea Pot Did you answer this riddle correctly?
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A mailbox. Did you answer this riddle correctly?
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The letter M Did you answer this riddle correctly?
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No such names starts with capital "A" and ends with capital "A." Did you answer this riddle correctly?
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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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Adversity Did you answer this riddle correctly?
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Nothing Did you answer this riddle correctly?
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Friendship Did you answer this riddle correctly?
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Patience Did you answer this riddle correctly?
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Lemons! Did you answer this riddle correctly?
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