Posted by: no_quiero August 26, 2008
Mathematical Brain Teaser
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La la milayo.  My answer would have been

1. Turn on the one light for sometime and turn it off
2. Turn on the next light and go to the room
3. Touch the two lights which is not glowing. one which is hot corresponds to the switch which was on for some time. Cold one will be the one which was never switched.
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