## Two Classic Puzzlers from Cartalk

Puzzler 1: Every two-digit number can be represented as AB, where B is the ones digit and A is the tens digit. Right? So for example the number 43, A is 4 and B is 3. Imagine then that you … Continue reading

Puzzler 1: Every two-digit number can be represented as AB, where B is the ones digit and A is the tens digit. Right? So for example the number 43, A is 4 and B is 3. Imagine then that you … Continue reading

This great idea comes from Dan Meyer and mister2pi. When will the App Store hit 10,000,000,000?

Great post: http://math-blog.com/2011/01/13/developing-math-intuition/ Our initial exposure to an idea shapes our intuition. And our intuition impacts how much we enjoy a subject. What do I mean? Suppose we want to define a “cat”: Caveman definition: A furry animal with claws, teeth, … Continue reading

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Here’s a great set of facts about the number 73 (a Chuck Norris Number, sidenote I might grow to like that show but I can’t stand the laugh track): The mirror of 73, the 21st prime number, 37, is the 12th prime … Continue reading

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1. Cats, Dogs and Mice – Oh My! RAY: You’re given a hundred dollars and told to spend it all purchasing exactly a hundred animals at the pet store. Dogs cost $15. Cats cost a buck, and mice are 25 … Continue reading

This is a quick post describing one small reason (of many) of why I like SBG. The setup for the gradebook is as follows: each student gets 2 shots (in class) to quiz on each topic, the grade is out … Continue reading

From Webmaths: Pretty cool website, a bit like Project Euler, but with more approachable difficulty level: http://www.artofproblemsolving.com/Alcumus/Introduction.php Sample Problem: The leveling up system they have could be an excellent way to get students addicted to solving some novel math problems. … Continue reading

Christmas gift from lovely wife. Found here, or here. Just playing so far, got some of these formations from the thinkgeek video. Great fun! update: 1/7/11 – 1 more 🙂 (buckyball-ish, pentagons surrounded by hexagons)

After some of my favorite bloggers wrote posts talking about their favorite books of 2010, here and here, I’ve decided to do the same but with a twist. I don’t end up reading more than 5 books a year, but … Continue reading

This work by Dan Anderson is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Based on a work at http://recursiveprocess.com/.