Bulbs and switches Puzzle

3 bulbs in the 3rd floor and switches in the 1st floor. You are in in the 1st floor. You have to know which switch belongs 2 which bulb.its not in order.u can go up once an u can switch on once. how will you do it?

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sharad_vasisht
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Nov 30th, 2005
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kiran

Nov 30th, 2005

First ON any one of the switches keep it for some time and then switch OFF afterwards ON another switch from the remaining two then go to third floor u will see one light is ON that one is u r currently switched one and then test the bulbs ,the hotter of the remaining is the before switch's bulb. Another is the third one.

kiran4
Profile Answers by kiran4

Nov 30th, 2005

First put ON any one of the switches keep it for some time and then switch it OFF.Afterwards put ON another switch then go to third floor u will see one light is one that is u r currently switched one .Now test the other 2 bulbs one will be hotter than the second that is u r previously switched bulb and another bulb is for third switch.