I think you would have to look at this for a very long time to work out what is unusual about the arrangement of squares. Scroll to the bottom of this post if you want to know now In July The Big Internet Math-Off 2019 took place. This was a semi-serious competition to find The …
Tag: puzzle
Flatland Lock
About ten years ago we came across a puzzle called Bank Raid, in Leonardo’s Mirror & Other Puzzles by Ivan Moscovich. The puzzle itself was inspired by the 2- dimensional world of Flatland: A Romance of Many Dimensions by Edwin Abbott Abbott. At the time we made a crochet blanket. Obviously it was not possible …
Ins and Outs of Flexagons
I have always been fascinated by flexagons and have made several over the years, some more successful than others. My first crochet hexaflexagon was about twenty years ago and, amazingly, it is still surviving. It isn’t the most comfortable cushion in the world but it is great fun. I can absolutely predict what will happen …
Magician’s Chain
Several years ago, Colin Wright (mathematician/magician/juggler extraordinaire) showed me a Magician’s Chain. This is a toy made from metal rings where the rings cascade from the top of the chain. It was fascinating, fun, and quite intriguing. I have seen Colin’s chain, and others, many times since. Then, a few months ago, I was at …