Maria Droujkova and Yelena McManaman expected to answer questions about math when they came out with their first book, "Moebius Noodles: Adventurous Math for the Playground Set," earlier this year.

If you've ever wanted to live in a mathematical head-scratcher, the Moebius House is the home for you. Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET. When not ...

At least, George Hart does, because he figured out how to do a two-twist Möbius cut into a bagel. Not bad. But I don’t think it would satisfy my hunger. You can only schmeer one side! Photo by George ...