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Plus Advent Calendar Door #10: Positional genius

Thank goodness for the number 10!

Plus Advent Calendar Door #9: The missing pound

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

Plus Advent Calendar Door #8: Counting infinities

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

Plus Advent Calendar Door #7: Seven is lucky!

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

Plus Advent Calendar Door #6: Six out of forty-nine

What's your chance of winning the lottery?

Plus Advent Calendar Door #5: Five won't fit

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.

The leaning tower of PISA?

This year's PISA results have caused predictable headlines, but do the statistics add up?

Plus Advent Calendar Door #3: Watch your middle!

Make a fractal in infinitely many simple steps!

Plus Advent Calendar Door #2: Who will come second?

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

Plus Advent Calendar Door #1: Looking out for number one

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

Sneek peek at this year's advent calendar!

It's nearly time for the Plus Advent Calendar!

  • Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.