Wooden binary adding machine

Last week I wrote about the Eyeballing game, an applet that tests your visual accuracy. It was created by a woodworker. Well, as I was perusing his website I found another neat mathematical creation. He made a binary marble adding machine. He created this video showing it in action. I encourage you to visit his…

The eyeballing game

A friend of mine sent me a link to the Eyeballing Game, presumably because it looks mathematical. At a glance it does look like geometry, but really it is a test to see how well you can recognize when geometric images are correctly aligned. Here’s what the creator of the website (a woodworker) wrote: Some…