Pi Day, which occurs every 14 March – or 3/14, in the US date format – celebrates the world’s favourite mathematical constant. This year, why not try …

# Pi Day: Everything you need to know about your favourite mathematical constant

This Pi Day, try calculating this notorious number using balls and a cardboard tube, quiz yourself on the famous constant and tuck into some tasty facts about the famous ratio.

On March 14, mathematics enthusiasts celebrate Pi day, in honour of the famous ratio’s first few digits, 3.14. You probably know that pi is the …

14 March is Pi Day, a global celebration of the constant representing the ratio of a circle's circumference to its diameter. Think you know pi? Try …

# Pi Day Sale: Subscribe from £3.14

This weekend only!

This 14th March – 14/3, or 3/14 – is Pi day, and we at New Scientist are joining in the celebrations for the world’s most famous irrational number, 3.1415926… Take advantage of our special Pi day offer...

# The most difficult problems in maths and how they were solved

# More magnificent mathematics

Maths is in everything from your credit card PIN to how many friends you have. Compute how to figure out apps and speed dating with TV presenter and …

A more efficient way of making an espresso could reduce the amount of coffee wasted per cup, potentially saving billions of dollars every year. Coffee …

The Welsh language could be set to thrive over the long-term, according to projections of whether endangered languages will flourish or fail. New …

There is now one game to rule them all. Any two-player interaction – which means anything from international disputes to childhood stand-offs – can …

Third time’s a charm: just weeks after cracking an elusive problem involving the number 42, mathematicians have found a solution to an even harder …