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Christian, tired of failing his grandma-in-law’s mental arithmetic challenges, made an online puzzle generator to hone his skills.
This is an excerpt from friend of The Aperiodical, Matt Parker’s book, “Things to Make and Do in the Fourth Dimension”, which is out now in paperback.
For the past couple of weeks, I’ve been obsessively playing the game Twenty on my phone. Then I decided to make my own game in a similar vein. The fact that my wife has consistently been ahead of my high scores has nothing to do with it.