# A room without windows contains a door without any windows and inside.docx

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A room without windows contains a door without any windows and inside is a light bulb on the ceiling. There are no light switches inside the room. On the outside of the room are three switches. Your task is to figure out which one of the three switches controls the light bulb. You may change the light switches from on to off as often as you want, but when you do you CANNOT see in the room because the door must be shut! You can only change the switches when you are OUTSIDE the room and when the door is SHUT! You may enter the room only once but you must close the door after you enter and again when you leave. There is a ladder in the room as well. You cannot see through any cracks in the door. How would you figure out which switch controls the light bulb? Solution press switch 1 for 2 minutes then press switch 2 now go inside room which bulb glows switch 2 represetn that now tocuh other two bulbs which bulb is hotter thet represents switch 1 remaining bulb represnets switch 3 .

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### A room without windows contains a door without any windows and inside.docx

• 1. A room without windows contains a door without any windows and inside is a light bulb on the ceiling. There are no light switches inside the room. On the outside of the room are three switches. Your task is to figure out which one of the three switches controls the light bulb. You may change the light switches from on to off as often as you want, but when you do you CANNOT see in the room because the door must be shut! You can only change the switches when you are OUTSIDE the room and when the door is SHUT! You may enter the room only once but you must close the door after you enter and again when you leave. There is a ladder in the room as well. You cannot see through any cracks in the door. How would you figure out which switch controls the light bulb? Solution press switch 1 for 2 minutes then press switch 2 now go inside room which bulb glows switch 2 represetn that now tocuh other two bulbs which bulb is hotter thet represents switch 1 remaining bulb represnets switch 3
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