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number posts

Guess my number Game

by David, 12 November 2013 | 2 comments

the number 86

Here’s an easy game to try with a friend. All you need is a pen and paper.

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Folding a piece of paper in half Activity

by David, 29 October 2013 | 2 comments

This activity sounds super easy from the title, but there’s more to it than you might expect!

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Measuring money Activity

by David, 8 October 2013 | 2 comments

Jar full of Australian coins. ©iStock.com/CraigRJD

There are some surprising patterns that can be revealed in Australian coins if you take a closer look.

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Birthday paradox Activity

by David, 3 September 2013 | 5 comments

A wrapped gift, a party hat, decorative ribbon, and a cupcake with a lit birthday candle on a calendar. ©iStock.com/Double_Vision

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

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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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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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 | 2 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

Foam gears with numbers written on them

This crafty cog activity will get your mind spinning and help you learn more about how we count. Safety: This activity uses a craft knife. Ask an adult to help.

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