Issue 20 was released in November 2024. Enjoy the articles online or scroll down to view the magazine as a PDF.
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Features
In conversation with Robin Wilson
Ashleigh Wilcox and Ellen Jolley chat to the professor and maths communicator about books, the Open University and music
Winning Wythoff’s game
Molly Ireland presents a gambit which will impress your mates
Notched edge cards
Joe Celko makes a database from card and knitting needles
On the cover: Spirographs
Ashleigh Wilcox, Jenny Power and Rachel Evans show you how to draw pretty pictures
Easy to state, hard to prove: The Collatz conjecture
90 years later, we're still unable to prove this surprisingly simple statement
The problem with addition
It doesn’t add up for Patrick Creagh
Borwein integrals
Aimen Khan ponders how patterns break down
Ferm-ant’s principle
Tyler Helmuth has lost his ant-vocado
Poly-π
Clem Padin calculates π, but not as we know it
Treating the differential with discretion
Sophie Bleau explores the differential on Morseback.
Fun
Cryptic crossword, Issue 20
Can you solve it?
A mathematician’s guide to Edinburgh
Stranded in Scotland's capital? This guide will keep you busy
Dear Dirichlet, Issue 20
Cricket, coursework and karaoke are among the problems solved in this issue's Dear Dirichlet agony aunt column
Prize crossnumber, Issue 20
Can you solve it?
Top ten: top tens
The undisputed top ten top tens this season
Which animal are you?
Find out by using our simple flowchart
Do you dress like a mathematical cliche?
Fashion fiend of fashion flop? Take our quiz to find out
What’s hot and what’s not, Issue 20
Fashion is fleeting, Chalkdust regulars are not.
The big argument: Should we write another issue?
How much barrel is left to scrape?
Printed versions
More from Chalkdust
Read Issue 21 now!
Sudoku, potatoes and crossnumber's biggest secrets finally revealed in our spring 2025 issue. Plus all your favourite columns!Prize crossnumber, Issue 21
Can you solve it?Dear Dirichlet, Issue 21
Suits, sofas and sculptures punctuate the prof's postbag this issue
Book of the Year 2024
We announce the winners of this coveted prizeCryptic crossword, Issue 21
Can you solve it?
Chalkdust dissertation prize winner 2024
Molly Ireland shares her experience of winning our first ever dissertation prize!