## G4G9: Report From the Festivities!

Quick interviews with folks here at the Gathering For Gardner, including Stephen Wolfram, Will Shortz, Dale Seymour, John Conway and many others.

Quick interviews with folks here at the Gathering For Gardner, including Stephen Wolfram, Will Shortz, Dale Seymour, John Conway and many others.

Puzzler Derrick Niederman tells us about his new book, Number Freak: From 1 to 200, the hidden language of numbers revealed, full of lore, mathematical amusements and numerical tidbits!

So, I’m teaching a new course, Math 2033, Mathematical Thought, and it’s going great! I’d like to take a moment to write about it!

(This is one reason the MF has been kinda slow lately; another is that I’m chair) When it’s fully up and running, we’ll have about 150 students in one large section each semester (we’re starting with about 100). In a nutshell, it’s the Math Factor, as a course.

Michael Huber discusses the mathematics of the Twelve Labors of Hercules!

Rob Fathauer discusses the ins and outs of the mathematical toy business, and we ask: For which numbers is the sum of digits the same as the sum of digits of twice the number. For example:

The sum of the digits of 351 is 9 and the sum of the digits of 2 x 351 = 702 is also 9.

1) If a number has this property, can we always rearrange its digits and obtain another number with this property (513, 135, etc all have it)

2) Which powers of 2 have this property?

3) And most of all, can you give a simple characterization of the numbers with this property, in terms of just the digits themselves?

Our favorite new and not-so-new products of 2008!

Check out these great gifts!

- Zome is an incredibly powerful construction system!
- the great puzzles of Puzzellation (available at Barnes and Nobles)
- The terrific puzzle computer game DROD
- The Magic Mirror Image Coloring Book
- The Riddles of the Sphinx by David J Bodycombe, an amazing compendium of puzzles, of hundreds of kinds, at all levels of difficulty, with historical essays to boot!
- Which leads us to Nikoli, the great Japanese puzzle co! (Rules can be found here)
- The Princeton Companion to Mathematics is a landmark classic. A must-have for every serious student, researcher or amateur.
- How Round is Your Circle just one of the many fantastic titles out on Princeton University Press
- AK Peters is another fantastic press, with a wide range of interesting math and CS titles, including, ahem, the Symmetries of Things.
- Binary Arts/ThinkFun is another source of great puzzles!
- And the authors Martin Gardner and Ivan Moscovitch are always fantastic!

Hope this helps and have fun!! Let us know how it works out!

Happy Holidays from the Math Factor!

Now, really, tell me, what good is a podcast if you can’t promote your beautiful new book?

We are very very pleased to announce the publication of The Symmetries of Things, a comprehensive, modern account of the mathematics of symmetry, complete with over 1000 illustrations!

We visit a giant model of a four-dimensional polyhedron, made of the fabulous Zome math construction toy. Paul Hildebrandt, president of Zome, weighs in!