There are three bulbs in a room with no windows. Their switches are outside the room and you don’t know which switch is connected to which bulb. You can turn the switches on and off as many times as you like but can enter the room only once. How will you determine which switch is connected to which bulb?
Come back tomorrow for the correct answer to this teaser.
Answer for yesterday's Brain Teaser
What number should replace the dark square?
Answer
5
Solution: Start from 15, if alternative numbers are subtracted on going clockwise direction, +1, +2, +3 and +4 will be obtained.
