When I first loaded the article, the first thing I saw was the first image (a good blogging tip to keep in mind, by the way) and instantly I knew this was going to be good.
The Asymptote. This representation of one of the coolest behaviors a function can have is also good for germaphobes afraid of physical contact.
The High 5, Mod 5. Ever wondered, “What exactly is the difference between a fist bump and a high-five?” The pedestrian mind might say, “One uses closed fists, and one uses open palms.” But I reply that in modular arithmetic, there is no difference at all.
![](http://cdn.makeagif.com/media/1-22-2014/QOzT4p.gif "In modular (or "clock") arithmetic, the number system starts repeating after a certain point. In mod 5, we count 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0.... and so on. So 5 and 0 are the same number, mod 5.")
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`The Penguin' says... 