## 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.

## GU. Number Freak!

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!

## GL. Math 2033

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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.

## GK. Mythematics

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

## FT. Sum and Double, Double and Sum

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?

## ET. Your Holiday Shopping Guide

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

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

Happy Holidays from the Math Factor!

## DY. The Symmetries of Things

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!

## BT. A Runcinated Dodecaplex

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!