Advent calendar 2013

There's nothing simpler than 1,2,3, ...

We're keeping a watchful eye on the Christmas pounds behind door number 9...

How do I love infinity? Let me count the ways....

Seven is a lucky number. No, seriously, it is!

What's your chance of winning the lottery?

Triangles do it, squares do it, even hexagons do it — but pentagons don't. They just won't fit together to tile your bathroom wall.