Our original prize crossnumber is featured on pages 54 and 55 of Issue 09.
- Although many of the clues have multiple answers, there is only one solution to the completed crossnumber. As usual, no numbers begin with 0. Use of Python, OEIS, Wikipedia, etc. is advised for some of the clues.
- One randomly selected correct answer will win a £100 Maths Gear goody bag, including non-transitive dice, a Festival of the Spoken Nerd DVD, and much, much more. Three randomly selected runners up will win a Chalkdust T-shirt. Maths Gear is a website that sells nerdy things worldwide, with free UK shipping.
- To enter, enter the sum of the across clues below by 9 September 2019. Only one entry per person will be accepted. Winners will be notified by email and announced on our blog by 28 September 2019.
Moonlighting agony uncle Professor Dirichlet answers your personal problems. Want the prof’s help? Send your problems to firstname.lastname@example.org.
My husband and I have found ourselves in a long-distance relationship. His company offered him a large promotion if he moved to Canada for six months, but it seems now that the position will require more time. I’m not sure that I want to move out there with him, or that I could be happy knowing he had to move back here. Conversation with the time difference is hard as well. Any tips?
— Getting tensor, Four Oaks
This issue, Top Ten features the top ten Chalkdust regulars! Then vote here on the top ten issues of Chalkdust for issue 10!
At 10, it’s the page you probably didn’t use to find this page: the contents page
At 9, it’s the big block of text on the page that no-one looks at: the editorial
Did you know
that the online vote is the reason that did you know
made it to number 8?
At 6, it’s the puzzles page
. Can you work out why it’s so popular?
At 5, and causing a moderate amount of recursion, it’s top ten
Storming back into the top ten after not being seen since issue 03, it’s the horoscope
what is the second most popular Chalkdust regular?
Dirichlet says: No idea.
Maths is a fickle world. Stay à la mode with our guide to the latest trends.
HOT The 10-issue challenge
We challenge you to write an article for issue 10 of Chalkdust.
NOT The 10-year challenge
What’s so special about base 10 anyway?
Be warned: this article is dark and full of spoilers.
One of the best parts of getting into a series is getting to know and love the main characters. However, in Game of Thrones (or A Song of Ice and Fire, for you purists), this can be a heart-breaking activity. Who will survive to the end and who will bite the dust? No one knows, but perhaps maths can lend a hand.
Image: Andrew Beveridge
Andrew Beveridge and Jie Shan used network theory to investigate who the main characters of Game of Thrones are. The diagram above shows all the interactions between characters during the seventh series: the larger characters are more central, as determined by the PageRank algorithm.
However, it only takes one swing of an axe to drastically change the network…