"Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems.

The motivation for starting Project Euler, and its continuation, is to provide a platform for the inquiring mind to delve into unfamiliar areas and learn new concepts in a fun and recreational context."

It's like seeing a cross section in time of two superimposed waves

made with paper.js

RT @simonw: How to slice a bagel in to two linked halves: totally doing this with my next bag ...

"Using this data, the Allies were able to create a mathematical model to determine the rate of German tank production, and estimated that, during the same summer 1940 to fall 1942 time period, the Germans produced 255 tanks per month -- a fraction of the 1,400 estimate produced by conventional intelligence.  (Want to see the math?  Click here.)  And it turns out, this method worked best: after the War, internal German data put the number at 256 tanks per month. "

"Gary Foshee, a collector and designer of puzzles from Issaquah near Seattle walked to the lectern to present his talk. It consisted of the following three sentences: "I have two children. One is a boy born on a Tuesday. What is the probability I have two boys?" The event was the Gathering for Gardner earlier this year, a convention held every two years in Atlanta, Georgia, uniting mathematicians, magicians and puzzle enthusiasts. The audience was silent as they pondered the question. "The first thing you think is 'What has Tuesday got to do with it?'" said Foshee, deadpan. "Well, it has everything to do with it." And then he stepped down from the stage."

sweet, an online version of the game

UPDATE:analysis is flawed, see http://www.jgc.org/blog/2009/06/scaccobeber-analysis-of-iranian.html "Not so in the data from Iran: Only 62 percent of the pairs contain non-adjacent digits. This may not sound so different from 70 percent, but the probability that a fair election would produce a difference this large is less than 4.2 percent. And while our first test -- variation in last-digit frequencies -- suggests that Rezai's vote counts are the most irregular, the lack of non-adjacent digits is most striking in the results reported for Ahmadinejad. Each of these two tests provides strong evidence that the numbers released by Iran's Ministry of the Interior were manipulated. But taken together, they leave very little room for reasonable doubt. The probability that a fair election would produce both too few non-adjacent digits and the suspicious deviations in last-digit frequencies described earlier is less than .005. "

"cookie-sized computers with motion sensing, neighbor detection, graphical display, and wireless communication. They act in concert to form a single interface: users physically manipulate them - piling, grouping, sorting - to interact with digital information and media. Siftables provides a new platform on which to implement tangible, visual and mobile applications."

"aim is to provide simple, fun, competitive games that help children learn and gain confidence with Maths, English and other key skills and knowledge"

possibly the hardest math class in the country

every study which has shown “spreading” essentially makes a Monty-Hall-like error, by neglecting the fact that people’s choices aren’t random; that in fact their choices teach you something.

males are much more variable in their mathematical ability, meaning that females of any age are more clustered toward the center of the distribution of skills and males are spread out toward the ends

A graph is connected (as mentioned above) if it is possible to get between any two vertices of the graph by moving along the edges of the graph.

A strange new family of algorithms probes the boundary between easy and hard problems (does P = NP?)

This script calculates great-circle distances between the two points – that is, the shortest distance over the earth’s surface – using the ‘Haversine’ formula.

historical point of view can provide context, motivation and direction to mathematics courses.

a Turing Machine implemented in Conway's Game of Life

Dr. Nowak identified the conditions when it can arise with a simple equation: B/C>K. That is, cooperation will emerge if the benefit-to-cost (B/C) ratio of cooperation is greater than the average number of neighbors (K).

Simply put, if something is flowing, it will branch in a fairly predictable pattern to reduce imperfections like friction, or in this case, bumping into pedestrians coming the other way. "Natural systems will always move toward faster access or easier flo

Three players enter a room and a red or blue hat is placed on each person's head. The color of each hat is determined by a coin toss, with the outcome of one coin toss having no effect on the others. Each person can see the other players' hats but not his

Hadamard's survey found a massive disconnect between how we teach math and science and how mathematicians and scientists actually work.

The intent is to convey, not abstract rules for manipulating numbers, but what the numbers mean, and why the rules are what they are (and cannot possibly be anything else).

1988 docudrama about "the ideas of Douglas Hofstadter". It was created by Dutch director Piet Hoenderdos. Features interviews with Doug ... all » Hofstadter and Dan Dennett. Dennett also stars as himself.

a GIMP plug-in which allows distortion of images specified by mathematical formulae. For each pixel in the generated image, an expression is evaluated which should return a pixel value

The Pi Searcher lets you search for any string of digits (up to 120 of them) in the first 200 million digits of Pi. You can also show any substring of Pi.

Calculate or Convert data from one data type [byte, KB/ MB/ GB] to other [gigabyte, megabyte, byte, bits]. This is simple and easy online calculator or converter.

Once you have seen 37% of the application forms, "a coherent picture of the ideal employee is built up and the next person to fulfil these criteria gets the job".

P vs NP Problem

barometer

In their search for patterns, mathematicians have uncovered unlikely connections between prime numbers and quantum physics. Will the subatomic world help reveal the illusive nature of the primes?

A phenomenological law also called the first digit law, first digit phenomenon, or leading digit phenomenon.

Daniel Tammet is an autistic savant. He can perform mind-boggling mathematical calculations at breakneck speeds. But unlike other savants, who can perform similar feats, Tammet can describe how he does it.

A generation ago, quants turned finance upside down. Now they're mapping out ad campaigns and building new businesses from mountains of personal data

Teaching by Asking Instead of by Telling