You are standing outside a basement door, Down the stairs, there are 3 light bulbs. Next to you, are 3 switches. You cannot see the lights from upstairs, and you must decide which switch controls which lightbulb by going downstairs once. How do you do this?

• frist switch on one bulb and leave for 2 mins after that switch it off
  next swicth on second one and leave it
  in downstairs touch the bulbs which are switched off , bulb which is hot is one which is swicthed on frist and remaining is last one
• 10 years agoHelpfull: Yes(1) No(0)