Three Doors Puzzle (& Other Conundrums)

Lamedoggo · *by **Lamedoggo** on Thu 15/Jun/06 9:26pm*

For your typical 100w bulb?

Or the smaller 60w frosted?

:hmmm:

sifter · *by **sifter** on Thu 15/Jun/06 9:28pm*

PedalOn wrote: Can you start upstairs, with one light turned on?

that would do it, wouldn't it?!

JohnnyC · *by **JohnnyC** on Thu 15/Jun/06 9:28pm*

psychavoc wrote: And can you see the light intensity from say, the stairway?

No

PedalOn wrote: Can you start upstairs, with one light turned on?

That would require going upstairs, and turning the light on first

Something to do with what a lightbulb creates

sifter · *by **sifter** on Thu 15/Jun/06 9:29pm*

JohnnyC wrote:Something to do with what a lightbulb creates

good clue! One on, and left on. One on, then turned off just before you sprint up. The other off. Great!!!!

psychavoc · *by **psychavoc** on Thu 15/Jun/06 9:29pm*

Light?

Electrical current?

Colin · *by **Colin** on Thu 15/Jun/06 9:29pm*

JohnnyC wrote: Something to do with what a lightbulb creates

Ah, I see. :thumbsup:

psychavoc · *by **psychavoc** on Thu 15/Jun/06 9:30pm*

Ah. Nice one sifter

E Dogg Capizzle · *by **E Dogg Capizzle** on Thu 15/Jun/06 9:30pm*

Turn one on, then turn it off. Turn another one on. Go up and see which one is on and which one is warm.

JohnnyC · *by **JohnnyC** on Thu 15/Jun/06 9:30pm*

sifter wrote:
JohnnyC wrote:
psychavoc wrote: And can you see the light intensity from say, the stairway?

No

PedalOn wrote:Can you start upstairs, with one light turned on?
That would require going upstairs, and turning the light on first

Something to do with what a lightbulb creates

good clue! One on, and left on. One on, then turned off just before you sprint up. The other off. Great!!!!

Bingo

psychavoc · *by **psychavoc** on Thu 15/Jun/06 9:31pm*

sifter wrote:good clue! One on, and left on. One on, then turned off just before you sprint up. The other off. Great!!!!

Don't even have to sprint. You can just leave one on for ages. Then turn it off, turn another one on, and go upstairs. The hot one in the other room would be the first light switch, the one on would be the second, and the one off that's cold would be the third switch.

SamultheCamul · *by **SamultheCamul** on Thu 15/Jun/06 9:40pm*

PedalOn wrote: You have a 3 x 3 grid of spots.

Bisect all nine spots with 4 connected straight lines. Stopping and retracing a line counts as starting a second line. No folding the paper.

[edit] Figure it out for youself, but hold off the answer until tomorrow to give others a chance to ~~go crazy~~ find the solution.[/edit]

I can think of how to do this with three lines :eh:

psychavoc · *by **psychavoc** on Thu 15/Jun/06 9:40pm*

Without taking your pen off the page though?

sifter · *by **sifter** on Thu 15/Jun/06 9:41pm*

MotoBouy wrote:
PedalOn wrote: You have a 3 x 3 grid of spots.

Bisect all nine spots with 4 connected straight lines. Stopping and retracing a line counts as starting a second line. No folding the paper.

[edit] Figure it out for youself, but hold off the answer until tomorrow to give others a chance to ~~go crazy~~ find the solution.[/edit]

I can think of how to do this with three lines

are they joined?