Riddle: The 4 lights MOVED

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Comments

Unknown said…
You have 4 switches (A,B,C,D). Turn on switches A and B for about 5 minutes. Turn off switch B, turn on light D, and enter the room.
A=(Hot, On)
B=(Hot, Off)
C=(Cold, Off)
D=(Cold, On)

This only works if you know how the off and on positions correlate to the lights.

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