Find a way to my Heart: The 1-in-10 Gay Problem Continued…

August 4th, 2009 1 comment

This post builds on the ideas from the first 1-in-10 Gay Problem post and takes a step into the creative world of abstract maths.

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The 1-in-10 Gay problem!

July 28th, 2009 3 comments

…a maths problem that is.

“If 1-in-10 people are gay, and there are 10 people in a room, one of the people in the room must be gay!”

Is this true?  Take a look here for the full analysis!

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The Shrinking Square

February 19th, 2010 1 comment

Fullscreen capture 19022010 221332.bmp

When the area of the green square is two-fifths of the area of the whole diagram, what fraction do the four black triangles occupy?

Open the post to play with a Java applet.

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The Trapezoid Trap

October 1st, 2009 3 comments

What is this shape called?


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November 29th, 2010 1 comment

Tonight I made these instead of tidying my flat


March 9th, 2011 1 comment

Please forgive my appalling lack of posts in recent months.  I’ve been working on a project with the above name, which seeks to place cameras in objects that can rotate on any axis, a football for example!  Exciting stuff, but I can’t share the maths with you on here.

VAT increased to 20% – is it worth panic buying?

June 24th, 2010 1 comment

The coalition has announced that VAT will increase from 17.5% to 20% on January 4th 2011.


A TV is advertised at £1000 including VAT at 17.5%.

VAT is increased to 20%.  What will the new price tag be?


The immediately apparent answer is £1025, because we’ve “added 2.5%”.  But that’s not quite right…

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Folding a Trapezium: Solution

September 27th, 2009 2 comments

A Geometric Secret of A4 Paper



We wish to make two folds in a rectangular piece of paper to form a trapezium (or trapezoid for the chaps across the water).  Read more…

Folding a Trapezium (Problem only)

August 26th, 2009 No comments

A Geometric Secret of A4 Paper

Trapezium A4-1

I’m not just going to give the answer away this time!  At least not for a while anyway… (Click here for the solution) Read more…

Mathematical Mice – Part I

August 21st, 2009 4 comments

Mrs Farmer is frightened of mice.  One day she finds 3 mice in her kitchen.  She tries to scare them out, but these are no ordinary mice…

Mice Think Dice

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How Mandelbrot’s fractals changed the world

October 18th, 2010 No comments

In 1975, a new word came into use, when a maverick mathematician made an important discovery. So what are fractals? And why are they important?

BBC News – article