Light bulb - Revision history

Oscarlevin at 01:49, 15 October 2010

2010-10-15T01:49:05Z

← Older revision		Revision as of 19:49, 14 October 2010
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	{{Hint \| Think about real lightbulbs, not mathematical abstractions.}}		{{Hint \| Think about real lightbulbs, not mathematical abstractions.}}
	{{Solution \| ~~Turn~~ the first switch ~~on for~~ 5 minutes. Then ~~turn~~ it off and ~~turn~~ on the second switch ~~and~~ walk down to the basement. If the light is on, then the second switch is the one that controls the light. If the light is off, you feel the bulb. If it is hot, then the first switch controls the light. If it is cold, the third switch (which you never touched) controls the light.}}		{{Solution \| Flip the first switch and wait 5 minutes. Then flip it off and flip on the second switch. Now walk down to the basement. If the light is on, then the second switch is the one that controls the light. If the light is off, you feel the bulb. If it is hot, then the first switch controls the light. If it is cold, the third switch (which you never touched) controls the light.}}

	[[Category: Lateral thinking]]		[[Category: Lateral thinking]]
	[[Category: Cases]]		[[Category: Cases]]

Oscarlevin at 01:48, 15 October 2010

2010-10-15T01:48:14Z

← Older revision		Revision as of 19:48, 14 October 2010
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	A very strange house has a single light bulb connected in the basement. The switch for this light is located on the top floor. Actually, there are three switches on the top floor: two of them do nothing, and the third controls the light in the basement. It is impossible to tell whether the light is on or off when you stand by the switches. How can you determine which switch controls the light bulb while only walking down to the basement one time?		A very strange house has a single light bulb connected in the basement. The switch for this light is located on the top floor. Actually, there are three switches on the top floor: two of them do nothing, and the third controls the light in the basement. It is impossible to tell whether the light is on or off when you stand by the switches. How can you determine which switch controls the light bulb while only walking down to the basement one time?

	{{~~hint~~ \| Think about real lightbulbs, not mathematical abstractions.}}		==Help==
	{{~~needs_answer~~}}
			{{Hint \| Think about real lightbulbs, not mathematical abstractions.}}
			{{Solution \| Turn the first switch on for 5 minutes. Then turn it off and turn on the second switch and walk down to the basement. If the light is on, then the second switch is the one that controls the light. If the light is off, you feel the bulb. If it is hot, then the first switch controls the light. If it is cold, the third switch (which you never touched) controls the light.}}

	[[Category: Lateral thinking]]		[[Category: Lateral thinking]]
	[[Category: Cases]]		[[Category: Cases]]

Zerrakhi at 12:52, 13 October 2010

2010-10-13T12:52:41Z

← Older revision		Revision as of 06:52, 13 October 2010
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	A very strange house has a single light bulb connected in the basement. The switch for this light is located on the top floor. Actually, there are three switches on the top floor: two of them do nothing, and the third controls the light in the basement. It is impossible to tell whether the light is on or off when you stand by the switches. How can you determine which switch controls the light bulb while only walking down to the basement one time?		A very strange house has a single light bulb connected in the basement. The switch for this light is located on the top floor. Actually, there are three switches on the top floor: two of them do nothing, and the third controls the light in the basement. It is impossible to tell whether the light is on or off when you stand by the switches. How can you determine which switch controls the light bulb while only walking down to the basement one time?

			{{hint \| Think about real lightbulbs, not mathematical abstractions.}}
			{{needs_answer}}

	[[Category: Lateral thinking]]		[[Category: Lateral thinking]]
	[[Category: Cases]]		[[Category: Cases]]

Oscarlevin: Created page with 'Here is a classic lateral thinking puzzle. ==Puzzle== A very strange house has a single light bulb connected in the basement. The switch for this light is located on the top f…'

2010-04-08T00:28:19Z

Created page with 'Here is a classic lateral thinking puzzle. ==Puzzle== A very strange house has a single light bulb connected in the basement. The switch for this light is located on the top f…'

New page

Here is a classic lateral thinking puzzle.

==Puzzle==

A very strange house has a single light bulb connected in the basement. The switch for this light is located on the top floor. Actually, there are three switches on the top floor: two of them do nothing, and the third controls the light in the basement. It is impossible to tell whether the light is on or off when you stand by the switches. How can you determine which switch controls the light bulb while only walking down to the basement one time?

[[Category: Lateral thinking]]
[[Category: Cases]]