The run-up to Christmas is a busy time, so why not make a cup of tea, put your feet up for a few minutes, and learn some maths at the same time? Each door of this year's advent calendar conceals a favourite item from our *Maths in a minute* series, explaining important mathematical concepts in just a few words.

Find out what's behind today's door!

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## Comments

## nice idea

Nice idea, God bless all Plus magazine; and Maths in a minute series team.