There are three switches in downstairs and three Bulbs in upstairs. Your mission is to find out exactly what are the switches for each of the Bulbs. You are allowed to make only one trip to go up and come down in order to make checking. All the swtiches are now in switched off position.If you have any questions you may please ask me...
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You can leave one switch turned off (say switch # 1) and switch on the other two. In these 2, turn off one switch (say switch # 2) before you go to upstairs.
Now the one still glowing is connected to Switch # 3. The one that is slightly warmer to touch is Switch # 2 and the one thats cold / normal is Switch # 1.
Is this the right answer?
switch on the first switch and wait for sometime. then switch it off. then switch on the second switch and go upstairs. the bulb which is lighting is of that switch which is on. and touch the other 2 bulbs. the one which is hot is of that switch which was previously on. thats it....
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