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Posts by David

Approximately pi facts about pi approximation day News

by David, 22 July 2013 | 0 comments

1. Pi (or π) is a number that helps describe circles. It links the width of a circle with its perimeter, or the radius of a circle with its area, or the width of a ball and its volume. It’s the same number no matter how big your circle is – about 3.14159265.

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A giant step for twin primes News

by David, 10 July 2013 | 0 comments

Dr. Yitang (Tom) Zhang

Three and five. Five and seven. Eleven and thirteen. Prime numbers often appear as twins, only two apart. For hundreds of years, mathematicians have wondered – is there a biggest pair of twin primes, or does the list of twins keep going forever?

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The Ancient Greek social network News

by David, 9 July 2013 | 0 comments

An ancient Greek jug with a picture of a man sitting, surrounded by others.

In the last decade, services such as Facebook have provided scientists with lots of information about current friendship links. However, they tell us little about historical friendships. So what might be the structure of an Ancient Greek social network?

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Connection conniption! Activity

by David, 2 July 2013 | 0 comments

Three factories drawn on a white mug.

Do you have a favourite mug? This is my favourite. Not only does it hold my hot chocolate, it has a wicked tricky puzzle on it!

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Napier’s bones Activity

by David, 18 June 2013 | 0 comments

four strips of paper with numbers on them. The top number on each strip is highlighted - 4, 6, 7, 0

How did people multiply before calculators were invented? You could try doing it in your head, but you could also use a mechanical calculator, such as this set of Napier’s bones.

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The four colour problem Activity

by David, 4 June 2013 | 0 comments

a map of Europe. Each country is coloured in and somoene is currently finishing colouring Bosnia.

Colouring in is for kids? Well, it’s also for mathematicians! Grab some pencils and have a go at one of the most interesting mathematical problems around!

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Arrow maze Activity

by David, 21 May 2013 | 0 comments

A grid filled with arrows.

Here’s a fun puzzle! it’s a maze with no walls. So what’s keeping you on track? well, this maze is made of arrows – it’s an arrow maze!

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Draw an infographic Activity

by David, 7 May 2013 | 0 comments

Numbers are very important, but they can be boring and hard to read. A better way might be to draw an infographic!

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Anzac science Activity

by David, 25 April 2013 | 1 comments

It’s Anzac Day – time to stick a sprig of rosemary in your hat, go to the dawn service and bake a batch of Anzac biscuits. But, while I was baking, I noticed some strange things going on.

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Anamorphic art Activity

by David, 23 April 2013 | 0 comments

Check out this trick! by colouring in boxes, you can make a strange blobby picture that transforms when reflected in a curvy mirror!

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