Welcome to this week’s Math Munch!

Big numbers are sometimes hard to get a feel for. A billion is a lot, but so is a million. The MegaPenny Project is a cool attempt at making the difference between large numbers easier to grasp. Would 1,000,000 pennies fill a football field or would you need a billion pennies for that? MegaPenny can help you figure it out.

Next up, we have kixote, a puzzle in the spirit of Sudoku and Ken-Ken, but involving knight’s moves. Dan Mackinnon–its creator–has a blog called mathrecreation that he says, “helps me go a little further in my mathematical recreations, helps me understand things better, and sometimes connects me to other people who share similar interests. I hope that it might encourage you to play with math too.” I’m sure we’ll be linking to more of Dan’s posts in the future!

Finally, since the mazes and paper-folding were so popular last week, we thought that this week we would share some **paper-folding mazes**! Here is a clip of MIT professor Erik Demaine talking about how he has created origami mazes, preceded by a discussion of origami robots that fold themselves! The clip is a part of a lecture about origami that Erik gave last spring in New York City for the Math Encounters series put on by the Museum of Mathematics. You can watch Erik’s entire origami lecture from the beginning by clicking here.

You can also check out Erik’s Maze Folder applet–but if you try it out, take his warning and start with a small maze!

Bon appetit!