The Prime Composite Dance

In this blog, I have written quite a number of articles about prime numbers. In one of my posts, I have emphasized that geometrically, the dots that represent a prime number can only be arranged in a 1 x p rectangular arrangement where p is prime.  Composite numbers on the other hand, can be arranged geometrically into more than 1 rectangular arrangements.

prime-composite-dance

Stephen Von Worley has given a more beautiful definition of primes and composites in his  Factor Dance Animation .  The brilliant animation is a rearrangement of dots (circles) that represent numbers into different groups every second. Its aim is to show the “compositeness” and “primeness”  of numbers from 1 up to 10,000. Worley’s program used the algorithm Brent Yorgey, the writer of The Mathematics Less Traveled.

You can read more about the animation at Wolrey’s post titled Dance, Factors, Dance. You may also want to watch the beautiful animation.

How To Embed Wolfram Demonstrations on Websites and Blogs

A year ago, I shared about Wolfram Demonstrations, now a collection of more than 8000 free interactive materials in mathematics and science . The Demonstrations are created with Mathematica, a commercial software, but they can be downloaded and used for free using the Computational Document Format (CDF) Player.

In August 2012, the site provided a code for each demonstration to enable embedding in websites and blogs. In this post, we learn how to do this. Note that this tutorial is intended for the not-so-techie mathematics teachers who want to add interactive worksheets to their websites and blogs. » Read more

6 Awesome Sites for Learning Number Properties

It’s 2013! Do you want to know what is so special about the number 2013? Or, maybe it’s not just 2013 that you want to know about.

number properties

If you are fascinated with number properties, I’m sure you will be delighted to visit the sites below. Each site contains a list of positive integers and interesting facts about them. » Read more

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