Posts Tagged: maths


3
Mar 10

Interesting freecycle freebiejeebies scam and a dubious experiment

Interesting freecycle freebiejeebies scam and a dubious experiment

I love scams. They're often ingenious and involve a good bit of psychology. It's great fun figuring out how they work.

I saw an interesting misuse of freecycle recently which was a scam of sorts. I'll tell you how it worked then introduce my own dubious experiment. Continue reading →


19
Feb 10

The Droste effect – image recursion

The Droste effect – image recursion

I love recursion. There's something about the way it invokes infinity that makes my head spin. Droste effect images are recursive images that got their name from a Dutch company that makes chocolates and cocoa and things like that. Continue reading →


15
Feb 10

Shapes of constant width – coins from around the world

In a previous post I talked about shapes of constant width. I didn't know of any other coins besides the UK 50p and 20p that had the property of being the same width all the way round without being circular.

Well I was recently given this coin instead of 20p:

Shapes of constant width   coins from around the world Continue reading →


8
Nov 09

How to cheat with Frank Benford

How to cheat with Frank Benford Pick a number at random from the universe. Not just from inside your head. Open a page of the financial times or look up the size of a planet; convert you height to cubits or measure the weight of your favourite book. Something like that.

Don't actually do it, it's hypothetical. But ask yourself a question. What are the chances of that number starting with a 1? Continue reading →


29
Sep 09

Venn Vs Euler: The Diagrams

I know what you're thinking: what's the difference between a Venn diagram and an Euler diagram? Good question. The following diagram should clear things up:

Venn Vs Euler: The Diagrams

Just to clarify, Venn diagrams have regions for all possible combinations of groups whether there are things in those regions or not. Continue reading →


26
Sep 09

Bryan Adams Diagrams

I've been wanting to make one of those diagrams that describes a song. In the end I did a few for Bryan Adams. Here they are:

Bryan Adams Diagrams Continue reading →


21
Sep 09

Magnetic balls: reloaded

A few more exciting shapes made from magnetic balls. Here's the original post. And here's the full coverage.

This is a dodecahedron - 12 faces and 20 vertices (the faces a dimpled, that's not part of a standard dodecahedron):

Magnetic balls: reloaded

Continue reading →


16
Sep 09

Magnetic balls: the beginning

I bought these magnetic balls off eBay and I've made loads of cool stuff with them.

Trouble is, after I've made one cool thing I have to destroy it before I can make another cool thing. So this blog will also serve as a photographic record of my achievements.

Let's get started then. These are the balls in an unordered state:

Magnetic balls: the beginning

And here they are as a Möbius Strip:

Magnetic balls: the beginning

Continue reading →