Updated: 2010-07-31 20:44:03
As you can see, the projectiles post went out last weekend… well, last Monday evening, when technical posts usually go out. In a way, I’m sorry to have used my reserve post so quickly, and yet that is what it was for: to let me do mathematics almost all weekend. I picked up quaternions as [...]
Updated: 2010-07-31 04:19:41
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Updated: 2010-07-30 21:49:48
Ready. Set. Go to kindergarten! It’s time to get the little ones ready for the classroom and DreamBox Learning is here to help. Our August Math Activity Calendar is all about kindergarten readiness and we’re celebrating with counting, cutting and coloring activities to prepare future kindergartners for their first days of school!
Math Activity Calendar Highlights:
International [...]
Updated: 2010-07-30 16:12:42
Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Pythagorean triangles on a circle July 30th , 2010 by Sol If you’ve not yet discovered the Wolfram Demonstrations Project site you’re in for a great treat . The site has tons of interactive Math applications that you can run with the free Mathematica Player . In other words , you don’t need to own Mathematica to run the demonstration . apps I find many of the apps to be very interesting . One I particularly like is Enumerating Pythagorean Triangles It shows a nice relationship between Phythagorean Triples positive integers a , b , c such that a^2 b^2 c^2 and the unit . circle If you enjoyed this post , make sure you subscribe to my RSS feed Post a Comment Name E-mail will not be published
Updated: 2010-07-30 09:04:16
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Updated: 2010-07-28 19:21:07
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Updated: 2010-07-28 16:22:29
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Updated: 2010-07-28 11:43:15
Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos A very clever calculator July 28th , 2010 by Sol Below is an image from Wikipedia of a calculating device invented in 1891, Genaille’s rods Each column in the image is a rod that can be placed wherever it’s needed in a . calculation The image shows how to easily calculate 52749×4. Can you figure out how this arithmetic tool works Making a set of these rods would be a great enrichment project . Here is a template in different sizes that you or your children or students can print and mount onto cardstock to make your own set . You’ll want to make a number of each of the rods so that you can multiply by numbers where one or more digits occurs more than . once If you enjoyed this post , make
Updated: 2010-07-27 12:11:53
Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Math Myths July 27th , 2010 by Sol Don Cohen , AKA The Mathman has been helping children of all ages to learn Math for 34 years . He has a CDROM , book Calculus By and For Young People which he sells via his . site I found these Math Myths from his site to be quite : interesting You can’t take 7 from 3. When you multiply , the answer is bigger . You have to add from right to left . When you subtract the result is smaller . Fractions are small numbers . There’s only one way to do something . When you add the result is bigger . When you divide the result is smaller . I can’t do it unless someone tells me how to do it . Math is hard and only a few people can do it . You have to know everything
Updated: 2010-07-27 01:21:51
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Updated: 2010-07-25 01:54:43
Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Rolling regular n-gons on catenary roads” July 25th , 2010 by Sol Here’s an interesting exploration , illustration courtesy of : Mathematica There’s a nice animated illustration at Mathematica A particularly interesting case of a roulette is a regular n-gon rolling on a road” composed of a sequence of truncated catenaries , as illustrated above . This motion is smooth in the sense that the geometric centroid follows a straight line , although in the case of the rolling equilateral triangle , a physical model would be impossible to construct because the vertices of the triangles would get stuck” in the ruts Wagon 2000 If you enjoyed this post , make sure you subscribe to my RSS feed Post a
Updated: 2010-07-25 01:01:52
Looking for fractions books? My book is the only book you will ever need to master fractions once and for all.
Updated: 2010-07-24 19:43:42
My mathematical life is getting a little more varied. As I get to the point of finally being able to compute with Boolean equations, my sense of urgency abates, and I can look at other topics. Eliminating a variable from a set of logical equations turns out to be very easy… and this means that [...]
Updated: 2010-07-24 11:53:20
Mental Floss is one of my very favorite magazines. Here’s a simple (if you see it) puzzle from their web-site:
The answer is here.
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title: "Mental Floss brain game",
url: "http://wildaboutmath.com/2010/07/24/mental-floss-brain-game/"
});
Updated: 2010-07-23 18:30:30
Title: The Computer as CrucibleAuthors: Jonathan Borwein and Keith DevlinTrue pp.: 154Publisher: A K Peters LtdPublished on: November 2008ISBN-13: 978-1568813431Rating: 8/10 Jonathan Borwein and Keith Devlin are well-known mathematicians who have a strong appreciation of, and expertise in, experimental mathematics. In this book they provide us with a concise, inviting introduction to the field. The [...]
Updated: 2010-07-23 01:08:10
Here’s a very geek way to impress your geek friends. asciiTeX!
Like the name says, asciiTeX takes input similar to that for LaTex and renders mathematical equations in plain ASCII. Wow!
Check it out at Sourceforge.net.
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title: "Have you seen asciiTeX?",
url: "http://wildaboutmath.com/2010/07/23/have-you-seen-asciitex/"
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Updated: 2010-07-22 16:55:05
: Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos The Khan Academy : 1400 free videos and counting July 22nd , 2010 by Sol If you’re a student , or teacher , or homeschooling parent and you’ve not heard about the Khan Academy you owe it to yourself to check it out . Salman Khan quit his career in the financial world to teach the world via videos . If you look on Khan’s Youtube Channel you’ll see videos on biology , linear algebra , chemistry , calculus , statistics , physics , differential equations , algebra , arithmetic , GMAT problem solving , pre-algebra , trigonometry , probability , geometry , precalculus , Singapore Math , and . more Khan has also made videos of all eight Math SAT practice tests in the College Board’s Official SAT
Updated: 2010-07-21 08:02:12
Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Granddaddy of fractals on TED July 21st , 2010 by Sol From TED At TED2010, mathematics legend Benoit Mandelbrot develops a theme he first discussed at TED in 1984 the extreme complexity of roughness , and the way that fractal math can find order within patterns that seem unknowably complicated . Here’s some biographical information on Mandelbrot Studying complex dynamics in the 1970s , Benoit Mandelbrot had a key insight about a particular set of mathematical objects : that these self-similar structures with infinitely repeating complexities were not just curiosities , as they’d been considered since the turn of the century , but were in fact a key to explaining non-smooth objects and
Updated: 2010-07-20 15:44:33
Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Perelman in The New Yorker an oldie but a goodie July 20th , 2010 by Sol There’s been a lot of press lately about how Russian mathematician Grigory Perelman has turned down the 1 million prize offered by the Clay Mathematics Institute for solving one of the world’s hardest problems , the Poincaré Conjecture But , these news stories typically provide little information about the problem or the man who conquered . it In 2006, The New Yorker ran a lengthy piece , Manifold Destiny providing plenty of background . It’s a lengthy but very compelling read despite its . age If you enjoyed this post , make sure you subscribe to my RSS feed 1 Trackback(s Jul 20, 2010 : Perelman in The New Yorker an
Updated: 2010-07-19 11:32:58
Wild About Math Making Math fun and accessible Home About Articles Math contest problem links Videos Interesting relationship among primes July 19th , 2010 by Sol Many properties of primes are very difficult to determine and prove . Here’s an exploration that’s within reach of many of : us What is interesting about the difference of the squares of most any two primes In other words , what is interesting about p 1 2 p 2 2 for most primes p 1 and p 2 When does this property hold Prove your assertion . I got the idea for this puzzle exploration from Standup Maths and adapted it to make it harder If you enjoyed this post , make sure you subscribe to my RSS feed 11 Responses to Interesting relationship among primes” By Tim Cowlishaw on Jul 19, 2010 Reply I’ve got this so far : http :
Updated: 2010-07-19 03:37:01
If someone wants to make $10.00 when selling an item and I get 40 how much do I need to add to $10.00 it's not coming out when I add 40 to 10.00
Updated: 2010-07-17 19:57:02
My mathematical life continues to be extremely narrowly focused; I’m doing logic. I hope that the next post will summarize syllogistic reasoning… I think I can pretty clearly see the light at the end of the tunnel for this post. Of course, my favorite version of Murphy’s Law is: the light at the end of [...]
Updated: 2010-07-13 03:14:11
I just received a mass email on how to live longer and it made these points:
Tip 1. Delay your retirement. Studies show that people who retire at 65 live longer than people who retire at 60.
Tip 2. Sex makes you younger. Studies show that older people who have sex twice a week look ten [...]
Updated: 2010-07-09 21:36:37
It's time to get patriotic! Fourth of July is right around the corner, which means it's time to let freedom ring with summertime activities and enjoyable learning holidays. Freedom math month celebrates history and math with exciting counting games and problem solving fun - the perfect recipe to avoid the summer slide!
Updated: 2010-07-07 16:13:53
Paul Olson will present a seminar July 15th at 1:30 PM in Nick 168.The title of the talk is Sequences of Surreal Numbers; an Update and Applied Harmonics of an Electronic Keyboard.Treats will be provided.
Updated: 2010-07-05 19:02:09
Sergei just came back from MOP — Mathematical Olympiad Summer Program, where he was a grader. The first question I asked him was, “What was your favorite math problem there?” Here it is:
There are wisemen, hats and rooms. Hats are of different color and there are enough hats of each color for every wisemen. [...]
