02016. Light switches
difficulty ·answer type: strategy·✓Not solved
Problem
There is a light bulb inside a room and four switches outside. All switches are currently in the off state and only one switch controls the light bulb. You may turn any number of switches on or off any number of times you want. How many times do you need to go into the room to figure out which switch controls the light bulb?
Submit answer
You must be signed in to submit answers.