Posted by: Simsim August 25, 2008
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No Quiero,
Room # A: Say, Swiches 1, 2 ,& 3.
Room# B; Say, Bulbs B1,B2 & B3 that correspond to Switches 1, 2 & 3 respectively.
- Go to Room A and turn on switches 1 & 2 (leave switch 3 turned off).
- After few minutes turn off switch 2
- Now go to Room# B. You will see one of the bulbs lighting ie. A1- that corresponds to Switch 1
- Now touch remaining two bulbs i.e. A2 and A3.
- You will find bulb# A2 hot, as the switch # 2 was momentarily switched on.
- You will feel A3 cold, as the switch # 3 was never turned on.
So easy