Did the Barber Math Puzzler at the end of today’s Precalc H class. This is a lot of fun, and the students can work their way towards the general solution in less than 10 minutes!
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There are some interesting mistakes in this board. Love mistakes!


This problem has legs. I ran a Play with Math session with a bunch of teachers across NYS on google hangouts, and they solved it in very different and interesting ways. Try it out, it’s a lot of fun.

Here’s the work from the three different groups who were working collaboratively through a google doc:

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