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Pi

August 2021

  • Stock 3D illustration of pi letter over a circle drawing

    New mathematical record: what’s the point of calculating pi?

  • The previous world-record pi calculation had achieved 50tn figures.

    Swiss researchers calculate pi to new record of 62.8tn figures

March 2019

  • Portrait of Matt Parker, standup comedy maths 'nerd', for New Review, at the School of Mathematical Sciences, Queen Mary University of London, Mile End, London, 10/05/2013 Sophia Evans for The Observer

    Science Weekly
    Cross Section: Matt Parker - Science Weekly podcast

    Happy International Pi Day. To celebrate, Hannah Devlin is joined be mathematician and comedian Matt Parker to discuss maths anxiety and number crunching

March 2017

  • Mr Kipling apple pie, individual fruit pie Foods containing additives

    Alex Bellos's Monday puzzle
    Can you solve it? Pi Day puzzles that will leave you pie-eyed

    Two teasers – one gyral and one viral – to usher in the annual celebration of maths

September 2016

  • KATE BUSH IN CONCERT - AUG 1986<br>Mandatory Credit: Photo by Fotex/REX (127332c) Kate Bush KATE BUSH IN CONCERT - AUG 1986

    Brain waves
    How music sampled science: from Kate Bush to the Mosquito

    Whether it’s listening to ancient black holes, illustrating earthquake data or fending off teenagers, science has provided the inspiration for some unusual music

March 2016

  • Pie

    Alex Bellos's Monday puzzle
    Did you solve it? The Pi Day puzzle that will spin you in circles

  • Pi on chalkboard

    Pi Day: your guide to this infinitely interesting number

March 2015

  • The remnants of a cake decorated with the pi symbol

    Pi Day 2015: a sweet treat for maths fans

    Ratio of a circle’s circumference to its diameter has sparked memory contests and even a language – this year’s celebration of π is a once-in-100-year occasion

March 2011

  • A pi cake to mark Pi Day

    Notes & Theories
    Pi Day: Help yourself to a slice of infinite, transcendental pi

    It's in the nature of pi that everyone's birthday and name are encoded somewhere in this never-ending, never-repeating number

March 2006

  • News blog
    Pi-eyed

    Today is pi day, a celebration of one of the most-used yet bizarrest numbers in all of mathematics, writes Alok Jha.

    Pi (which begins 3.14, hence the celebration today) represents the ratio of a circle's circumference to its diameter. It goes on forever, and there are no patterns in the order of the digits. Little wonder mathematicians call it an irrational number. It has its uses in countless physics equations, endless mathematical formulae and near-infinite engineering problems.

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