Suppose there are three light switches outside a room. Inside is a single light bulb, controlled by one of the three switches. You need to determine which switch operates the bulb. You can turn the switches on and off as many times as you wish (they are all off to begin with), but may only enter the room once. There is no one there to help you. The door to the room is closed, and there are no windows, so you cannot see inside. How can you discover which switch operates the bulb?
Submitted by: AdministratorDo the following steps:
☛ 1. Turn ON two switches, and leave one OFF.
☛ 2. Wait a few minutes.
☛ 3. Turn one switch from ON to OFF. One is now ON and two are OFF
☛ 4. Enter the room. - If the light is ON, it is controlled by the switch you left ON. - If the light bulb is OFF, touch it. If it is warm it is controlled by the switch you turned ON and OFF. If it is cold, it is controlled by the switch you never turned on.
Submitted by: Administrator
☛ 1. Turn ON two switches, and leave one OFF.
☛ 2. Wait a few minutes.
☛ 3. Turn one switch from ON to OFF. One is now ON and two are OFF
☛ 4. Enter the room. - If the light is ON, it is controlled by the switch you left ON. - If the light bulb is OFF, touch it. If it is warm it is controlled by the switch you turned ON and OFF. If it is cold, it is controlled by the switch you never turned on.
Submitted by: Administrator
Read Online Coal Miner Mine Cutting Channeling Machine Job Interview Questions And Answers
Top Coal Miner Mine Cutting Channeling Machine Questions:
☺ | Top 12 Best Brainteaser Interview Questions: |
☺ | Where do you see yourself professionally five years from now As Coal Miner Mine Cutting Channeling Machine? |
☺ | What's a time you exercised leadership? |
☺ | What is your greatest weakness As Coal Miner Mine Cutting Channeling Machine? What are you doing to improve it? |
☺ | What are your salary expectations As Coal Miner Mine Cutting Channeling Machine? |
Top Construction Job Categories
☺ | Draftsman Interview Questions. |
☺ | Rigger /Technician Interview Questions. |
☺ | Construction Safety Interview Questions. |
☺ | Production Supervisor Interview Questions. |
☺ | Real Estate Analyst Interview Questions. |