• 
  Driven crazy
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  Pirate treasure
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  Use your head
• 
  Which way?
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  All around the world
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  Hats off
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  Shed some light
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  Einstein's riddle
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  Figure it out

Puzzles

Shed some light

A conference room contains three separate wall-mounted spotlights - right, left and front of stage. Each is controlled by its own on-off switch. These three switches are numbered 1, 2 and 3, but they are in a back room, which has no sight of the spotlights or the conference room (and there are no reflections or shadows or mirrors, and you are alone). How do you identify each switch correctly - right, left, front - if you can only enter the back room once?

Reveal answer