Last night my younger son asked me about . I got so caught up in thinking about what to talk about that I actually forgot the context that gave rise to the question. Oh well.

It certainly is true that comes up less frequently than plain old , but there were still a few fun ideas.

First was the obvious one – squaring the circle:

Finally, a fun suggestion from twitter:

@mikeandallie Which is larger, the square root of pi or the pi-th root of two?