Brainteaser - 29042019


  • Team myQ

    You’re in a room with three light switches, each of which controls one of three light bulbs in the next room. You need to determine which switch controls which bulb. All lights are off to begin, and you can’t see into one room from the other. You can inspect the other room only once. How can you find out which switches are connected to which bulbs?



  • @rishi As mentioned there are 3 bulbs. So we can no. the three switches as 1 2 and 3. We leave 1 in the off state. We put on switch 2 for few minutes and switch it off. Then we put on the 3rd switch. Now we can inspect the rooms. The room having light denotes switch 3. Now in between the left two rooms i will visit each of the two rooms. The room where we feel warmer it will denote the second switch. And the other room will have 1 no. Switch.


  • Team myQ