In a 2 stores house with no windows there are 3 switchers on the 2nd floor and 3 lamps on the 1st one. The house is completely empty no tools or stuff like that, and you are alone. How can you find out the connection between the switchers and the lamps by going up and down one time.
ps. you cannot rip the house apart! By defauld the switchers are off.
someone told me this yesterday and I am still thinking.... umm any ideas??