|
This one is old, but not alot of people get it......
There are two rooms. One room has 3 light switches, the other room has three lights. There's one door connecting the rooms together. There are no windows or anything on the walls.
You're in the room with the switches....your objective is to figure out which light switch turns on what light by only opening/going thru the door once.
How is this achieved?
|