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Puzzle from Infosys

there are 3light bulbs inside a room and their switches outside the room. You can enter the room only once and you need to exactly find which switch is for which bulb." 

you need not be a student of EE to solve this.

think think. . . 

"Literary education is of no value, if it is not able to build up a sound character"


First put the first switch for half an hour, then put the second switch and go inside the room.
The bulb which glows is for second switch. Now touch other 2 bulbs. One which is hot is for first switch and the other bulb is for third switch..

Somesh - V+ Team Junior Moderator - Want for other subjects also? Arrow CLICK HERE


Ya right..:-)
there is no need to keep the bulb ON for half hour... Even 5-10min is ok...
(after all we are electrical engineers; save energy ;-))

"Literary education is of no value, if it is not able to build up a sound character"



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