Vi genhører "Det sørme, det sandt, december"- Det giver spørgmålet

"Hvilken decemberdag er dagen før dagen før dagen du ved?"

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Amaze your friends with this one weird trick that mathematicians really want you to know!

Here's a clip from #WhatCanMathematiciansDo where I show how to make a five-pointed star from a folded piece of paper with a single cut.
It's a nice trick, and you can work out how to do it with just the insight that all the cut edges have to be on top of each other when you cut.

https://www.youtube.com/watch?v=S90WPkgxvas

#math #christmas #christmath