The Skeptical Community

The Sydney-Perth train leaves Sydney at the same time as the Perth-Sydney train leaves Perth. Each train travels at a constant speed. After meeting...

Imagine a snug-fitting rope around the Earth's equator. Suppose you added an extra 1 inch of length to the rope, held it at a point, and lifted until...

OK, here we go again. I've got a different fish in my trousers. 20 questions again. Try to narrow it down intelligently this time, instead of taking...

This was one of those teaser questions on a World Poker Tour that's supposed to keep you from changing the channel while the commercials play, but it...

I have a fish in my trousers. You have to guess what kind of fish. Rules are the same as 20 Questions. Any question or guess counts as 1 question....

A tsunami has just hit FEMA Beach and has rearranged a few things. Please put the 9 objects back where they belong to see the cyber-prize!

I love...

:roll:

...

Be a slacker by being a simulated slacker. :D

(work safe)

Sucks to your ass-maar!
In keeping with my personal policy that forum spam must have some enlightening & redeeming value (ref: Venn Diagram Maker,...

This strange little compelling online game has a bunch of us hooked, including my Mum and my work supervisor (which is handy when i play at work,...

Rules same as last time, see first game thread for details. 24 hour rule in effect blah blah blah.

There will be two tables, 9 person max on each....

OK, I'm not the most technically savvy guy. I read Scientific American and understand most of it, but I'm no genius. At , I came across this...

I posted this on the old puzzle forum, but it appears that some folks who post here don't post there, so ...

Actually, they may not be dwarves....

A friend gives Tommy an audio cassette and asks him to listen to the music on it. She says that side A of the cassette is completely filled with...

I've decided to run the thing as a yearly event, given that it just might take that long in the multitable format...

So this one starts Jan 1, 2005....

For the four real numbers a, b, c, d the following is true:

a^2 + b^2 + c^2 + d^2 = ab + bc + cd + da

Prove that a = b = c = d.

Police Sketch Artists Game

See how well you can create a famous person, or yourself. Can you make one accurate enough to allow police to find you?

This is a cool little online game. Create your own country, decide which way it leans politically, deal with policy issues and negotiate (or not)...

Enjoy.

Make sure you have a few hours to be frustrated though. ;)

Say that 3 times fast.

Got kids? Like mazes? Tired of cutting out paper dolls? Try the maze maker. I also can see photoshop possibilities.

Bored with Rock-Paper-Scissors? Try this.
Rock Paper Scissors Spock Lizard

OK, I'll explain it so simply that even you can understand. I post a verse from a song, you name the song and the artist, and you post another verse...

1 fan
1 ball

What could go wrong?

Yeah, kinda explains itself.

I'm thinking of trying the same thing except a multitable this time, so more seats will be available.

Nothing morally...

Here is a crossword puzzle I created fourteen years ago, based upon the classic movie It's A Wonderful Life! Many thanks to Skeptoid for making the...

I constructed this crossword around 25 years ago. It was my second construction and my first attempt at a themed puzzle. To make it a little more...

This is a cool little online game. Create your own country, decide which way it leans politically, deal with policy issues and negotiate (or not)...

PLEASE NOTE - This thread is intended for official game use only. All manner of discussion, ridicule, and questioning of your intrepid tournament...

Why don't you guys just sit out and fold the blinds to me? You'll last longer and you won't be around to suffer the humiliation of defeat.

XOXO...

I was just wondering if I'll be seeing any of my fellow forum whores on the official boards or in game. 8)

Who else is addicted to this game?I started playing it seriously at my summer job about a year ago, and slowly built up until I was spending nearly...

My pal mentioned a game that he had heard 2 of the temp workers discussing in the cafeteria. This game is either an on-line game or it is some...

Can a line be drawn (similar to the red line, for example) from the origin without hitting any of the infinitely many points (x,y) where x and y are...

A travelling salesman has been assigned a new route. He will have to visit 20 customers in 20 different cities. Of course, since he does not want to...

My birthday is coming up, and I decide to bake a birthday cake, and put some candles shaped like numbers on top. So I go to the store and buy two...

Previously:

Tommy is working at the supermarket again, and the same egg-obsessed manager has made Tommy build two different-sized pyramids of eggs,...

...of the dark part:

A square can end with any (even) number of zeros, but if it ends with any other digit, the 'tail' will never be longer than three digits. What is the...

I usually play this trick at the math buffs one or two years ahead of me, who think that they how to do integrals. It's actually very simple and...

An old one. No googling please!

Tommy bought four items at a 7-11 store, and was charged $7.11

Curious that the total was the same as the store...

Let n be a whole number. Show that n(n + 1)(n + 2)(n + 3) + 1 is a square.

Most puzzlers will have encountered the Knight's tour, but what about the Queen's? Starting from a corner square, say A1, the Queen can pass through,...

Given a circle of radius 2, show that no matter how 15 points are distributed within this circle it will always be possible to draw a circle with...

Given a whole number N which is both a cubic and a square number, prove that this number will always be of the form 7K or 7K + 1, where K is also a...

A simple one I saw in another forum.

How many pieces can you slice a donut into, using only two cuts?

How many pieces with three cuts?

Only...

Consider the curve of y=cos(arcsin(x)), prove that the curve is equal to a unit circle.

How many pennies can be arranged so that each penny touches every other penny. Don't just give a number; a description and/or diagram is required.

Not difficult but pleasingly worded. Chiasmus, I think?

Ceptimus, do you still have that applet?

FK SPNVNKFA JPNYXP NG KSY SKX JCS NLNYFYXG...

A box contains a number of socks, the number not exceeding 1993. Some socks are Red, some are Blue. The probability of randomly picking two socks of...