Answer for riddle asked on 07-JUL-2013 Night ..!
Turn on #1 and #2 only. Wait...
Turn off #2. Rush upstairs.
The correct switch is #1 if the bulb is lit, otherwise,
it's #2 if the bulb is warm,
or #3 if the bulb is cold.
Turn on #1 and #2 only. Wait...
Turn off #2. Rush upstairs.
The correct switch is #1 if the bulb is lit, otherwise,
it's #2 if the bulb is warm,
or #3 if the bulb is cold.
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