Wild About Math! Making Math fun and accessible

17Jun/11Off

Giveaway: Manga Guide to the Universe

Contest is over. Ron Green is our random winner. Congratulations, Ron!

The nice folks at No Starch Press are giving away a copy of their very new "Manga Guide to the Universe" to one lucky Wild About Math! reader. And, they'll ship it to anyone in the universe, although they used the word "planet." So, here's the deal. Leave a comment telling me you want to win. Be sure to put your email in the comment form. When I get 10 comments I'll disable commenting for this post and I'll have Random.org pick a lucky winner. I'll send your email address to the No Starch folks and they'll ship you the book. If you're one of these people who checks this blog continuously for updates then you might have a 10% chance of winning the book. Sweet!

From the book's web page:

Join Kanna, Kanta, Yamane, and Gloria in The Manga Guide to the Universe as they explore our solar system, the Milky Way, and faraway galaxies in search of the universe’s greatest mysteries: dark matter, cosmic expansion, and the Big Bang itself.

As you rocket across the night sky, you’ll become acquainted with modern astronomy and astrophysics, as well as the classical discoveries and theories on which they’re built. You’ll even learn why some scientists believe finding extraterrestrial life is inevitable!

Note that the ink on the books needs to dry so No Starch Press won't be shipping the book to the winner until the week of June 27.

Good luck!

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23Dec/100

Ti-84 Plus Silver Edition giveaway winner

On December 9th I announced a contest to solve a challenge proposed by James Tanton.


STEM skills - science, technology engineering and math - hold the key to tomorrow's innovation. To help students learn tomorrow's job skills, Wild About Math! has teamed-up with Texas Instruments to give away a TI-84 Plus Silver Edition graphing calculator with GraphiTI package. To learn more about TI-84 graphing calculators or other TI products, visit: http://education.ti.com. To learn more about STEM careers, visit: http://education.ti.com/studentzone.


The problem was harder than I thought it would be. I got two submissions and only one was correct. So, I didn't need random.org to tell me who to award the prize to.

Our winner is Daniel Chiquito from North Carolina. Congratulations, Daniel!

Here's a PDF document with Daniel's solution.

I do have one comment on Daniel's solution. It's technically not a formula but an algorithm since it introduces a special case. The Encyclopedia of Integer Sequences (http://oeis.org/A000037), overcomes the issue with this formula:

floor(1/2 *(1 + sqrt(4*n-3)))+ n

I have another TI giveaway contest coming up in January so stay tuned.

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29Sep/10Off

Giveaway: One Minute Mysteries: 65 Short Mysteries You Solve With MATH!

[ Update: 10/25/10: Lance Hilfman has been selected as the winner of the book. If you were one of the 20 people to comment on this post you can get two books for the price of one on the purchase of up to four books. ]

Science, Naturally! is giving away a copy of "65 Short Mysteries You Solve With MATH!" to one lucky person in the U.S. This is a great book for kids that I reviewed some months ago.

To be in the running for this book, leave a comment (with your email in the comment form) telling why you'd like the book. When I get 20 comments I'll close comments for this post, I'll have Random.org pick a random comment, I'll pass your email address to the publisher, and they'll ship you the book. Remember, you must be in the U.S.

Good luck.

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20Sep/10Off

Free copy of Old Dogs, New Math to a lucky reader

[ Update 9/24: Maria won the copy of the book. Stay tuned for more book giveaways. ]

I just received this email from a publisher:

Dear Sol Lederman,

I’m writing from The Experiment, a nonfiction publisher in New York City. We’re just about to publish a new book for parents on math education—Old Dogs, New Math: Homework Help for Puzzled Parents, by Rob Eastaway and Mike Askew. We found your excellent math blog, and we thought that you might want to consider this new book for a review, for a reader giveaway, or otherwise for your site.

Old Dogs, New Math is a timely new resource for parents who would like to be able to help their children with their math homework, but who find themselves puzzled by the math problems their children have brought home, or who may have tried to offer guidance but whose kids advise, “That’s not how the teacher does it!”

Rob Eastaway, author of numerous popular math books, and Mike Askew, a college professor of math education, outline all the new strategies elementary schools use to teach students not only to solve math problems, but also to explain why their methods work. Old Dogs, New Math is sure to lower everyone’s stress levels when the hour rolls around every evening for math homework!

We’d be delighted to send you a review copy of Old Dogs, New Math to consider for your website, and/or a copy for a giveaway contest. If you’re interested, please advise me of where we should send a copy.

You can find more information about Old Dogs, New Math and its authors at the website: here.

The publisher is willing to give away a copy of the book TO A U.S. ADDRESS. Here's the game. Leave a comment if you'd like to win a copy of the book. Make sure to include your email address in the comment form. When I get 20 comments I'll disable comments for this post and I'll have random.org pick a random comment. That person will win the book.

Good luck!

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