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3.Switches Three switches outside a windowless room are connected to
three light bulbs inside the room. How can you determine which
switch is connected to which bulb if you are only allowed to
enter the room once?
Solution: Switch on the first switch,
leave it for a minute, and then switch it off again. Then switch
on the second switch and enter the room. The second switch will be
connected to the light that is on, the first switch will be
connected to the light with the warm bulb, and the third switch
will be connected to the light with the cold bulb.
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