Our original prize crossnumber is featured on pages 58 and 59 of Issue 05.
- 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. Three randomly selected runners up will win a Chalkdust t-shirt. The prizes have been provided by Maths Gear, a website that sells nerdy things worldwide, with free UK shipping. Find out more at mathsgear.co.uk
- To enter, submit the sum of the across clues via this form by 22 July 2017. Only one entry per person will be accepted. Winners will be notified by email and announced on our blog by 30 July 2017.
Moonlighting agony uncle Professor Dirichlet answers your personal problems. Want the prof’s help? Send your problems to email@example.com.
I personally have a very deep, long-held belief in free-market capitalism and the value of hard work, but I was recently shocked to discover when I switched subjects that most people in my new research area are staunch followers of Karl Marx! I’ve had many arguments with my new colleagues on this. I can feel my energy slowly draining with every passing debate. How do I resolve this?
— Feeling blue, Surreyv
This issue, Top Ten features the top ten parts of a circle! Then vote here on the top ten geometry instruments for Issue 06!
At 10, and dangerously close to having a “(sic)” added after it: the center.
Beating its American cover version to number 9 this week: Stuck in the Centre with You by Stealers Wheel.
Maths is a fickle world. Stay à la mode with our guide to the latest trends.
HOT Mathematical crochet
Hyperbolic surfaces! Klein bottles! Impress fellow passengers with your DIY manifolds!
[Picture: Flickr user Pandaeskimo, CC BY-NC 3.0]
NOT Paper Möbius strips
As Dirichlet says, Möbius strips should be band.
Our fiendish original crossnumber is available now