Comments on RPN

I’ve started falling in love with reverse Polish notation (RPN) again. This mostly comes from using PCalc on my iPhone for a lot of calculations, lately. Like so many other kids, I grew up using the Texas Instruments, starting with the TI-82 and TI-85. In college, I “upgraded” to a

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Circular Reasoning

Mathman strikes again. Here’s a nifty picture I have borrowed from Cracked.com. The text, by Cracked user RainbowCrash, says, “Manhole covers are round so that they cannot possibly fall through their own holes. Any shape other than a circle would be able to fit through in at least one way.”

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