Wild about Math blogs 5/27/11

June 3rd, 2011 | by Sol |

Welcome to wild about Math blogs!

This is the last edition. If you want to put on your own personal Math blog carnival, I recommend you follow the large list of blogs at Mathblogging.org and let us all know about the items you like. I trøde, I had a rather large list of Math blogs in my RSS reader; their list is much larger. You can subscribe to parts or all of their list via RSS and you can even follow the Twitter feeds of a bunch of Math bloggers.

I discovered some really wonderful BBC Math radio shows. See here.

Math teachers play Carnival # 38 is up on mathematics and multimedia.

I have spend time on the website, strong Math Pickle enjoys the simple yet deep and difficult to solve mathematical puzzles and games there since "inspired people" are particularly noteworthy. There are some familiar faces on the page, Martin Gardner, We Hart and James Tanton to name a few. And there are a lot of people I don't know much about whom I have read on. Here is an inspired person from the list:

Leo Moser seems to have been the first person who are in favour of unresolved problems used in K-12 education. He asked many hard problems with child-like eagerness: "what is the area in at least the House that a device worm can live comfortably?" importance which shape can cover a worm regardless of how he curls up?

And also from the site Math Pickle is a video of a fun division games with some deep things happening under the surface.

MAA NumberADay has an interesting bit in number theory:

The product of four primes in a prime quadruplet (with the exception of 5, 7, 11, 13) always ends in 189. Example: 101 x 103 x 107 x 109 = 121, 330, 189.

I was curious about why this should be and I got this tip from Wikipedia:

All primary quadruplets except {5, 7, 11, 13} is of the form {30n + 11, 30n + 13, 30n + 17, 30n + 19} for some integer n. (this structure is necessary to ensure that none of the four prime numbers are divisible by 2, 3 or 5).

You can see why the product should end in 189 (apart from the first set)?

Sue on Math Math writes has a challenging Math problem from "Rediscovering mathematics, by Shai Simonson."

Finally, here is a funny number line cartoon from xkcd.

Hat tip to Ars Mathematica.

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