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Message: <blockquote data-quote="MelenaZ" data-source="post: 237531" data-attributes="member: 97106"><p>some idiot asked it butdidnt put an answer.here is a tricky one, There is a light bulb in side a room, there is no way you can see into the room unless you are in there, in a different room there are three light switches and only one of them is the switch for the light bulb. How can you know which switch is for the light bulb if you are allowed only one trip into the room?</p></blockquote><p></p>