I had never heard of Vi Hart before. She has a lot of videos out there and is a fantastic talent.

Has she been able to leverage these videos into a money-making operation? If so, whatever she earns isn't enough!

Thank you for broadening my horizons. I'm going to watch more of her videos over the next few days.

On the topic of mathematics...

Many years ago (like about 40 or so) I came up with a math problem that intrigued me. I was never able to solve it, so on a whim I gave it to my office manager, who did. I don't remember her solution, only that it involved some outside-the-box thinking. Here's the problem:

Visualize an analog 12-hour clock with hour hand, minute hand, second hand. We know that at 12:00:00 all three hands are in perfect mathematically defined alignment. At what other times if any (such as five minutes and a few seconds after one, or maybe 21 or 22 minutes and a few seconds after four) are all three hands in perfect alignment. Prove (or disprove) it.

Fun, eh?

tanstaafl.