Puzzle
It's a long way to the top
In how many ways can you make it up the stairs?
News story
23 and maths
The company 23andMe made headlines by launching its DNA testing service in the UK. But how are the risks of developing a disease calculated?
Article
Mathematical mysteries: Hailstone sequences
Here's an easy game that leads you straight to an unsolved question in maths.
Article
Writing the unwritable: up-arrow notation
How to write down unimaginably large numbers using just a few symbols.
Collection
The 2014 Plus advent calendar
In this year's advent calendar we bring you some of our favourite books and other mathematical toys, so you can surprise your friends and family or, even better, yourself!
Article
The Sun, the Moon and trigonometry
A little trig helps to find the relative distance to the Sun and Moon.
Article
In the beginning…
Bob Wald tells us why probabilities are important in cosmology.
Article
Ebola: Evidence from numbers
Why maths is an important tool in the fight against Ebola.
Article
So you think you can add up?
Why do we add fractions the way we do? A very close look at addition reveals the answer — and it also works for negative numbers.
Article
Outer space: Where to stand to look at statues
John D. Barrow tells us how to get the best view!
Article
Solving quadratics in pictures
How to derive the famous quadratic formula from pictures, just like the Babylonians did.
Article
Maths in a minute: Euclid's fourth axiom
Euclid's fourth axiom says that all right angles are equal. But isn't that obvious?