by David, 3 September 2013 | 5 comments

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

Continue reading Birthday paradoxby 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.

Continue reading Approximately pi facts about pi approximation dayCategories:

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?

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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.

Continue reading Napier’s bonesby 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?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!

Continue reading Counting spiralsby 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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by David, 4 December 2012 | 0 comments

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.

Continue reading Counting gearsby David, 1 November 2012 | 3 comments

Mario has a whole pizza that hasn’t been cut. He cuts the pizza in half, and then cuts each of those pieces in half to make four pieces. He then cuts all of those slices in half, and then those in half and so on.

Continue reading Pizza brainteaser!Categories: