I could have sworn there was already a topic for this, but nevermind.
Does anybody here enjoy logic puzzles? Yesterday I found Whose Fish?, a puzzle supposedly written by Albert Einstein. I haven't solved it yet (both my girlfriend and my other girlfr-- er, StrongCanada managed it in about half an hour).

StrongCanada also turned me on to Sudoku, which is tons of fun.

Any favorite logic puzzles?

P.S. Please don't post solutions/answers to puzzles here. Feel free to posts links to solutions, but make sure it's appropriately labeled (a la spoiler warnings).

For the life of me, I don't know why that link isn't displaying as a link..

StrongCanada managed it in about half an hour.

How many F's?

FINISHED FILES ARE THE RE-
SULT OF YEARS OF SCIENTIF-
IC STUDY COMBINED WITH
THE EXPERIENCE OF YEARS

OH! I almost forgot the riddle called: The Secret Behind the Green, Glass Doors.:

Behind the doors there are:
Teens but no adults
Root Beer but no soda
Jeeves, Google and Yahoo, but no seach engines.
Butt Cheeks, but no vending machines.
Hills but no mountains.
Yellow but no blue
Summer and Fall but no Spring or Winter
a guy named Matthew lives there.
a girl named Jessica lives there
but not a guy named Jacob
Thomas nor Tom does not live there but Tommy does.

I could go on for a lot longer. If you want more hints, I'll post more.

If you figure it out: YOU ARE SWORN TO SECRECY!!! That is part of the secret behind the green glass doors. Not even a spoiler link. PM me with the answer if you think you've got it.

What are we supposed to figure out?

Odd, one would think that the 'net would be rife with solutions, but it seems not so. Well, I guess that's a good thing.

OH! I almost forgot the riddle called: The Secret Behind the Green, Glass Doors.

For the life of me, I don't know why that link isn't displaying as a link..

Billies Uncle works as a Butcher.He is 6'4,42 years old, and works 12 hours a day. What does Billies Uncle weigh?

(Spoiler Alert)
Meat!

If a red house is made from red bricks, and a pink house is made from pink bricks, whats a green house made from?

(Spoiler Alert)
Glass!

Hard to say if this one's a logic puzzle or a riddle, or maybe in between.

There are three ants in a line, all facing the same direction. The first ant says "there are two ants behind me." The second ant says "there is one ant behind me." The third ant says "there are two ants behind me."
How is that so?

*spoiler* he's a liar!

(Spoiler Alert)
They're all facing perpendicular to the line. (I tried to draw a diagram, but failed my ASCII check.)

Creative solution, Sui, but incorrect.

*spoiler* But if they're perpendicular to this line, then they are side by side, and then no ant can be behind another. Did I understand what you said?

(Spoiler) The original three ants are side by side, which means they're all facing the same direction, which is all that's necessary to satisfy the conditions of the riddle. The riddle does not say that any of the original three have to behind any other or that there are only three ants -- in fact, there are seven.

It's a clever riddle because we're used to thinking of ants marching in a line.

P.S. Firebird it ruins the fun if you post the answers, 'cause then when we quote you (to post our guesses) we see them!

(Spoiler) The original three ants are side by side, which means they're all facing the same direction, which is all that's necessary to satisfy the conditions of the riddle. The riddle does not say that any of the original three have to behind any other or that there are only three ants -- in fact, there are seven.

It's a clever riddle because we're used to thinking of ants marching in a line.

Oh, so I did understand you as to how they're positioned. The part that throws people off, and me as well after you revealed that one tidbit to me, may not be how they're standing, but how we assume there are only three. That's what got me. Dag, yo.

I could have sworn there was already a topic for this, but nevermind.

StrongCanada also turned me on to Sudoku, which is tons of fun.