Question

A riddle :u r standing outside a room. Inside the room there is a tube light and there r three switches outside the room within ur reach. U may press as many times the number of switches u want but u won't come to know which switch is the one for the tube light. U may go in the room to check if the tube light is on or not but u can't on or off the switch then once u go in. How will u come to know which is the correct switch for the tube light ????( If u want to know the answer ask me )

Answer 1

Light wud come out of d room....by switching on one tubelight at a time...as the light will come...dat particular switch will b d right one