Did you have a chance to see the sum-to-fifteen game I learned about last week?

Here is an animated version of playing it:

And here is what it looks like if you arrange the numbers in just the right 2d grid:

Did you have a chance to see the sum-to-fifteen game I learned about last week?

Here is an animated version of playing it:

And here is what it looks like if you arrange the numbers in just the right 2d grid:

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IPython Notebook for these animated gifs: https://gist.github.com/aflaxman/cf133640f44cc573c81cc3ba4f61488d