The day is finally here: issue 11 is out now! To help you celebrate launch day in style, we’ve set a puzzle hunt: throughout the day, we are posting a series of puzzles. The answers to these puzzles form clues to the four-digit code for the door to let you into the Chalkdust issue 11 secret backstage lounge.
There are five puzzles in the puzzle hunt. They are being posted every 2 hours: at 9am, 11am, 1pm, 3pm and 5pm.
Chalkdust dissertation prize winner 2025
Hannah Woods shares her experience as this year's dissertation prize winner
What’s hot and what’s not, Issue 22
Fashion is fleeting, Chalkdust regulars are not.
Read Issue 22 now!
DNA origami, tracks and an interview with El Nombre feature in our AW25 issue! Plus all your favourite puzzles & columns.
Prize crossnumber, Issue 22
Win £100 of MathsGear goodies with our famously fiendish crossnumber
Cryptic crossword, issue 22
Can you solve it?
Would you rather?
Some difficult dilemmas to ponder
Top Ten: mathematical pets
The undisputed top ten mathematical pets this season
My favourite Tom Lehrer song
We asked the team for their favourites
Which season are you?
Summer or winter? Or one of the others? Take our quiz to find out
What’s your American high school clique?
Find out by using our simple flowchart
Notched edge cards
Joe Celko makes a database from card and knitting needlesPrize crossnumber, Issue 11
£100 of MathsGear goodies to be won if you can solve it
What is the shape of you?
Are you a torus? A cone? Ed Spheran? Find out by answering a maximum of five easy questions
Dear Dirichlet, Issue 11
Grant applications, musical media and last-minute Olympics training are the topics readers have sent in to the professor's postbox this issueTop ten vote issue 11
Vote for your favourite maths-themed day out
Page 3 model: Cooking spaghetti
Some saucy modelling
How to make: Ecki the polytope
Make your own EckiWhat’s hot and what’s not, Issue 11
Fashion is fleeting, Chalkdust regulars are not.Top Ten: pictures of scorpions
The definitive chart of the best pictures of scorpions
In conversation with Hannah Fry
On the mathematics of love, communicating maths to the public, and women in maths.
More from Chalkdust
Chalkdust dissertation prize winner 2025
Hannah Woods shares her experience as this year's dissertation prize winnerWhat’s hot and what’s not, Issue 22
Fashion is fleeting, Chalkdust regulars are not.Read Issue 22 now!
DNA origami, tracks and an interview with El Nombre feature in our AW25 issue! Plus all your favourite puzzles & columns.Prize crossnumber, Issue 22
Win £100 of MathsGear goodies with our famously fiendish crossnumberCryptic crossword, issue 22
Can you solve it?Would you rather?
Some difficult dilemmas to ponder