# What's new

## number posts

by David, 3 September 2013 | 5 comments

How likely is it that at least two people out of 30 will share a birthday?

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## 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

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?

Continue reading A giant step for twin primes

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## Napier’s bones Activity

by David, 18 June 2013 | 0 comments

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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## How much is lots? Activity

by David, 25 March 2013 | 0 comments

Almost everyone uses the word lots, but what does it mean exactly? the only way to find out is to ask people!

Continue reading How much is lots?

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## Counting spirals Activity

by David, 16 February 2013 | 0 comments

There are some pretty amazing patterns lurking in nature. Do a bit of arithmetic and master the Fibonacci sequence, and then see where you can find it!

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## Fibonacci fruit Activity

by Mike, 16 January 2013 | 0 comments

Having trouble finding a four-leafed clover? This activity explains why! If you’re getting ready for some gardening, keep this activity in the back of your mind as you marvel at Mother Nature’s mathematics.

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## Counting gears Activity

by David, 4 December 2012 | 0 comments