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A man lives on the tenth floor of a building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator - or if it was raining that day - he goes back to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment. Can you explain why?
(This is probably the best known and most celebrated of all lateral thinking logic puzzles. It is a true classic. Although there are many possible solutions which fit the initial conditions, only the canonical answer is truly satisfying.)

DF
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quote:
Originally posted by DeepFat:
This one's not so much hard, as interesting.

You're in a car with a loose helium balloon. the balloon is floating up against the ceiling. the car and the balloon are not moving.

The driver hits the gas, forcing you back into your seat with the acceleration.


What does the balloon do?

DF


I cheated, so I won't chime in but to say that it is important to note that the windows in the care are up.
Here's another one from the old logic book:

You're on a desert island with two distict tribes of natives that look alike. One tribe always tells the truth and the other always lies. While walking, you come to a Y in the road and have no idea which way to do. Soon you see a native, but have no idea which tribe he's from. What question would you ask him to guarantee you take the right path?
first, let's assume I want to go to the truth telling village.

Now, let's say I'm considering the left path.

I ask the man on the left path "Will the man on the right path say the left path leads to the truthful village?"

If he answers No, take the left path. Because, if the truth guy is on the left path, he knows the right path guy will lie. If the liar is on the left path, he will lie about the answer he knows the truthful guy will give.

If he answers Yes, take the right path. Because, the truthful guy knows the liar will lie. The liar will lie about the truthful guy's answer.

Or something like that.

DF
quote:
Originally posted by dkn:
there is a black dog in the middle of a street with no lines or streetlights in a town painted black. a guy is driving a car with no lights right at the dog and swerves just before he hits the dog. how did he see the dog?


was it "truly" a black dog?....if it was...his body temp. would have had to have been at least 700 degrees Kelvin...then it would have apeared "red" since a black body does not emit radiation in the visible spectrum below that temp......he was ...a.. "SMOKIN DOGGGG"....on the other hand the driver could have been wearing infrared goggles...but he sill would have been a "HOT DAWG"....
Last edited by rramlimnn

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