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There are eight rooms, each with a single door to go in and out.

Four of the rooms have light switches and four of them have light bulbs.

You can enter and exit each room exactly one time. After you leave a room, the door closes and locks behind you.

Your job is to determine which light switches control which light bulbs.

2006-08-22 17:09:06 · 6 answers · asked by cyrus 2 in Education & Reference Trivia

if u want a copy of the pic of how the room luks just email me

2006-08-22 17:52:31 · update #1

cyrus_baggio@yahoo.com

2006-08-22 17:53:28 · update #2

6 answers

Not enough information. Is there a hallway to which all of these rooms are joined? Are all the doors open to start with? Are all the doors closed? Too many undefined variables to determine a viable answer.

2006-08-22 17:18:12 · answer #1 · answered by Jim T 6 · 0 0

Many varibles with this question. Assuming the switches are in the rooms with/without light bulbs vs. mounted on exterior walls where they could be separately turned ON outside of the rooms. Assuming that the electrical wires are buried in the walls where they can't be traced as to which rooms have power and which rooms have a light bulb and which switch goes to which bulb. Assuming that the rooms are completely enclosed with no escaping light. Assuming that all light switches are in the OFF position at the start of this exercise. Assuming that all switches are wired correctly so that OFF means no power flows through the switch. Assume that one switch controls only one light bulb. Assuming that all light bulbs are functioning. Assuming that all switches are functional Assume that the correct power is available to all switches and bulbs.

Table Rooms 1----2----3----4----5----6----7----8
no Sw
Sw
No Bulb
Bulb
Sw&Bulb ON
Sw&Bulb NO
No SW/Bulb

Worse case would be 4 rooms with switches only and four rooms with bulbs only.
Worst case would be to enter four rooms and find only bulbs. All is not lost. Plot the location of these rooms. We are looking for bulb distance from the light switches. Now acquire a sensitive voltmeter. When measuring in series with the circuit we will get a voltage drop when we turn the light ON. The last four rooms will all have a light switch with no bulbs.
Record the voltage drop when the switch is exercised to the ON position. Repeat for each room. Worse case would be if all rooms were equal distance apart and the readings were the same. If the rooms are in a line then room 5 controls room 1, etc.
This will not work if the rooms are spaced in a circle or vertically stacked as to be equal. This will not work if the electrician has coiled wire in the circuits in question.

2006-08-23 02:40:36 · answer #2 · answered by Bob 2 · 0 0

Go and open each door, but do not enter the room. Then, go into the rooms with the switches and flip them on. As you come out, note which lights are on. You shouldn't even have to enter the rooms with the lights, but if you make an error, watch for light under the door.

2006-08-24 12:19:01 · answer #3 · answered by rachelframecory 4 · 0 0

You need to turn on the lights, turn them off at different intervals and then chech the temperature of each bulb. You can tell by each bulb which switch operates them. (or something like that):))

2006-08-23 00:22:33 · answer #4 · answered by vande-man 3 · 0 0

flip all the light switched then go in the rooms where the light bulbs on to see wich is on

2006-08-23 00:15:30 · answer #5 · answered by tt 3 · 0 0

turn on all the lights and check temp

2006-08-23 00:26:25 · answer #6 · answered by Anonymous · 0 0

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