Try your brain at this tricky, but lovely, riddle.

Where have the COVID-19 vaccines got us so far and where we are likely to be when the rollout is complete?

A quick example of the art of rough and ready calculations.

It's with great sadness that we learnt about the death of John Haigh last week. As a small tribute to Haigh here is a collection of articles he wrote or co-wrote for Plus.

László Lovász has won one half of the Abel Prize 2021 for fundamental contributions to theoretical computer science and discrete maths.

You are faced with a difficult problem, it is not easily solved. How do you feel? Well, if you are Avi Wigderson, one of the winners of the 2021 Abel Prize, you are very happy!

From rabbits, to beauty, to myths and more – we celebrate Pi Day with the shiniest and most irrational of numbers!

From the mathematics of shuffling to tackling the COVID-19 pandemic, we've really enjoyed speaking to all of these female mathematicians about their work over the last year.

What's the safest way to reopen schools? And can testing make things better?

What is group theory and why is it such an exciting area of maths? Two experts explain.

When it comes to loosening COVID restrictions all eyes are usually on R — but it's also important to take account of prevalence.