More from Chalkdust
Unlocking sudoku’s secrets
Sara Logsdon looks to graph theory and abstract algebra for help on the puzzle page
Top ten: things to get in the post
The undisputed top ten things to get in the post this season
Celebrating simple mathematical models
Hollis Williams explores the power even simple models can have in describing the world around us.
7 ways to tell if a number is divisible by 7
Łukasz takes us on a tour through a surprisingly diverse range of algorithms to test for divisibility by 7
On the cover: Harriss spiral
Find out more about the spiral trees on the cover of Issue 09
Chalkdust issue 09 – coming 15 March
Read the magazine, and come to the launch party!