Mobius band Soma cube Julia set Ulam spiral 2-D projection of a tesseract Septafoil knot

Welcome to this website! It is a work in progress and I will be adding to it on a weekly basis. This website is dedicated to writing about all mathematical topics that interest me and many others. Some of these articles take the form of dialogues or fictional tales. Below is the complete list of all articles I have written so far. As this is currently a fairly small website, I will have a list of categories once it becomes larger. I also have a puzzle and there will be a new one every month. I will also post solutions at the end of each month.

I have not updated this for a long time as I have been writing a book, together with David Darling. The book is titled Weird Maths and is aimed at the intelligent layperson. It will be published in March 2018. We have also been working on a series of videos to accompany the book. They can be found here.

## Puzzles of the month

July/August 2015 - Summer Relay

September 2015 - Key Arrangements

November 2015 - Dividing the Tetrahedron

The following puzzles have expired their deadline.

December 2014 - Pyramid of numbers, solution

Christmas Special 2014 - Deer Oh Deer, solution

January 2015 - Alice and Bob, solution

February 2015 - Circles Inside Circles, solution

March 2015 - Six Boxes, solution

April 2015 - Hexagons Inside Hexagons, solution

May 2015 - Archimedean Cattle, solution

June 2015 - House Numbers, solution

October/Hallowe'en Special 2015 - Trick or Treat, solution

Here you can see all of the winners of past puzzles.

Hall of Fame

## Alphabetical

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

## Articles

Carl Friedrich Gauss

Colour Octonions

Combinatory logic

Complex Matters

Euclid was Wrong!

The fast-growing hierarchy

Finite projective planes

Flexagons

Four dimensional space

Graham's number

Groups

Hydras

Knot theory

Large numbers

Life

Life with ordinals

Möbius bands

Mr Jones in the Fourth Dimension

Multiplicative median

Non-transitive dice

Octonions

Pi

Prime numbers

Prime Problems

Pythagoras

Quaternions

Ramsey theory

Randomness

Set theory

Topology

Turing machines

Types of infinity

Why infinity is unreachable