If you are in a room with 5 coloured light switches(White,Red,Blue,Yellow,and Green),and you don`t know which one is on(ON) position and which is on(OFF) position.
You`ve been told to screw 5 coloured light bulbs(white,red,blue,yellow,and green)down in the basement,where there are 5 places ,one place for each bulb.
Your goal is to connect each bulb to its corresponding switch,with minimal times going down to the basement.
Note:
No one should help you.
You have to use these bulbs only ,i.e. No instruments.