 - Ben Walker, Adam Townsend & Andrew Krause invite you to play with their fun online PDE visualiser 
 - The Chalkdust editors share some of their favourites 
 - How big is the biggest cow? 
 - Adam Townsend sets the fifth and final puzzle. Can you solve it? 
 - More sartorial inquisition for your feet 
 - Should you ask Santa for 'Ice Col' Beveridge's encyclopedic tome this festive period? 
 - Chalkdust descends upon the UK's largest pop maths gathering and tells you what you missed 
 - A summer essential or an embarrassment risk on the streets of Ibiza? 
 - Write down a quadratic. What is the probability that it factorises? Paging Prof. Dirichet... 
 - We take a look at the top 10 emojis!