Advent calendar 2013

Make a fractal in infinitely many simple steps!

When Archilles and the tortoise race, who will come second? Find out behind door number two!

How can the number one help spot fraud in tax returns, elections, or mistakes in data sets? Find out behind door number 1!

It's nearly time for the Plus Advent Calendar!

Is it cold outside? Yes! The fire warm? Yes! Snow on its way? Yes! Do we love Christmas? YES! Celebrate the countdown with the Plus advent calendar featuring our favourite bits of maths.

Now, what's behind today's door...?