100 Incredible Lectures from the World's Top Scholars | Online Universities - StumbleUpon No matter what school you attend or what field of study you are following, it is easy to learn from some of the top scholars when you watch their online lectures. From words of wisdom on business, literature, science, technology, psychology, and more, you can hear what professors and experts from prestigious colleges and universities have to say. Take some time to check out these lectures in the quest to expand your knowledge. Business Find out what successful businesspeople and business professors have to say about business and entrepreneurship. Trends in Venture Capital Interest. Economics Economic experts discuss the past, present, and future of economics at home and globally. Understanding the Crisis in the Markets: A Panel of Harvard Experts. Literature and Writing These writing and literature lectures are led by some of the industry’s top scholars. The American Novel Since 1945. Neuroscience Professors and scientists from some of the top schools lecture here on neuroscience. Science

Sour Cream Noodle Bake Raise your hand if you love recipes with the word “Bake” in the title. This is a classic old recipe shared with my mom by her friend Betty Daley. I always loved it growing up, but the first time I made it for my own household years ago, it was met with mixed reviews. The original recipe calls for quite a bit of sour cream, and since my nuclear family is a little sensitive to large amounts of the stuff, I’ve adapted it through the years to suit the picky palates of the people I live with. Picky palates of the people. You’ll need ground chuck. Okay, fine. But ground chuck is best. You’ll need tomato sauce. You’ll need sour cream… Cottage cheese… Green onions… And grated sharp cheddar. Please grate your own. You’ll also need egg noodles. Oh, and I like No Yolks. No Yolks No Yolks No Yolks. Sorry. Begin by browning the meat in a large skillet. Drain off the excess artery-clogging material… Then pour in the tomato sauce. Stir it together… Then throw in some salt… In a separate bowl, add the sour cream…

Nerd Paradise : Divisibility Rules for Arbitrary Divisors It's rather obvious when a number is divisible by 2 or 5, and some of you probably know how to tell if a number is divisible by 3, but it is possible to figure out the division 'rule' for any number. Here are the rules for 2 through 11... The last digit is divisible by 2. The sum of all the digits in the number is divisible by 3. The last 2 digits are divisible by 4. The last digit is 5 or 0. The number is both divisible by 2 and divisible by 3. Cut the number into 2 parts: the last digit and everything else before that. The last 3 digits are divisible by 8 The sum of all the digits in the number is divisible by 9. The last digit is a 0. Break the number into two parts (like you did for the division by 7 rule). Also there is a quick way for determining divisibility by 11 for 3-digit numbers: If the inner digit is larger than the two outer digits, then it is divisible by 11 if the inner digit is the sum of the two outer digits. Rules for all divisors ending in 1... User Comments: 9 Dividing By 12

Famous Unsolved Math Problems as Homework | On Teaching and Learning Mathematics By Benjamin Braun, Editor-in-Chief, University of Kentucky One of my favorite assignments for students in undergraduate mathematics courses is to have them work on unsolved math problems. An unsolved math problem, also known to mathematicians as an “open” problem, is a problem that no one on earth knows how to solve. My favorite unsolved problems for students are simply stated ones that can be easily understood. In this post, I’ll share three such problems that I have used in my classes and discuss their impact on my students. Unsolved Problems The Collatz Conjecture. which will repeat forever in this way. The Erdős-Strauss Conjecture. For , we can write or In other words, if can you always solve the equation using positive integers , , and ? Lagarias’s Elementary Version of the Riemann Hypothesis. Our third unsolved problem is: Does the following inequality hold for all ? Impact on Students Students are forced to depart from the “answer-getting” mentality of mathematics.

True Facts Facts - interesting, provocative, well-seasoned One out of ten children in Europe are conceived on an IKEA bed. Antarctica is the only continent without reptiles or snakes. An eagle can kill a young deer and fly away with it. In the Caribbean there are oysters that can climb trees. Intelligent people have more zinc and copper in their hair. The world's youngest parents were 8 and 9 and lived in China in 1910. When George Lucas was mixing the American Graffiti soundtrack, he numbered the reels of film starting with an R and numbered the dialog starting with a D. The youngest pope was 11 years old. Mark Twain didn't graduate from elementary school. Proportional to their weight, men are stronger than horses. Pilgrims ate popcorn at the first Thanksgiving dinner. They have square watermelons in Japan - they stack better. Iceland consumes more Coca-Cola per capita than any other nation. Heinz Catsup leaving the bottle travels at 25 miles per year. It is possible to lead a cow upstairs but not downstairs.

Khan Academy - StumbleUpon It is possible to understand Engineers - Where there's a will, there's a way. Understanding Engineers #1 Two engineering students were biking across a university campus when one said, "Where did you get such a great bike?" The second engineer replied, "Well, I was walking along yesterday, minding my own business, when a beautiful woman rode up on this bike, threw it to the ground, took off all her clothes and said, "Take what you want." The first engineer nodded approvingly and said, "Good choice, The clothes probably wouldn't have fit you anyway." Understanding Engineers #2 To the optimist, the glass is half-full. To the engineer, the glass is twice as big as it needs to be. Understanding Engineers #3 A priest, an ophthalmologist, and an engineer were golfing one morning behind a particularly slow group of golfers. The engineer fumed, "What's with those guys? The doctor chimed in,"I don't know, but I've never seen such inept golf!" The priest said, "Here comes the greens keeper. He said, "Hello, George. The greens keeper replied, "Oh, yes. They were silent for a moment.

Tanya Khovanova’s Math Blog » Blog Archive » Divisibility by 7 is a Walk on a Graph, by David Wilson My guest blogger is David Wilson, a fellow fan of sequences. It is a nice exercise to understand how this graph works. When you do, you will discover that you can use this graph to calculate the remainders of numbers modulo 7. Back to David Wilson: I have attached a picture of a graph. Write down a number n. For example, if n = 325, follow 3 black arrows, then 1 white arrow, then 2 black arrows, then 1 white arrow, and finally 5 black arrows. If you end up back at the white node, n is divisible by 7. Nothing earth-shattering, but I was pleased that the graph was planar.

Prime Explorer Death by Caffeine We’ve used the very latest research to determine what’s appropriate for your body weight. See more about your daily caffeine limits. Recommendations for caffeine levels are different for aged 18 and under. Sure are. On the result, click on the item for more detailed caffeine information. Yes. A lethal dose is based on the amount of the caffeine in your system at one time. By using this calculator you agree to our terms of use. 100 Free College Courses To Develop Your Artistic Eye - StumbleUpon By Jill Gordon There’s a lot of thought and technique that goes into a work of art. Whether it’s a novel, film, sculpture or painting, the skills necessary to produce a quality piece of art are worthy of admiration. Check out these free online courses your artistic appreciation. Introductory Courses At first glance, understanding a great piece of art can seem overwhelming. Introduction to Photography: A course with a practical approach to the study of digital and analog photography. Paintings and Sculptures Learn more about the techniques of masters such as Da Vinci, Rembrandt or Van Gogh with these courses on art history and technique. 20th Century Art: Examines major developments in European and American art in the last century. Architecture Designing a building is a combination of both art and science. The Production of Space: Look at space from various perspective and points of departure. Music History, Composition and Theory English and World Literature Film, Radio and Television

Coin Operated Vending Machine Robbery – Learn how people rob pop, arcade and candy machines. Robbing Vending machines is not as hard as it seems and that is the reason why you will notice this being done a lot. This article on Coin Operated Vending Machine Robbery explains how people succeed in defeating the vending machines. Part 1 – How to Rob Pop Machines for money and pop Take an empty 2 liter bottle of pop and fill it with luke warm water. ). Part 2 – How to Rob Arcade Games This method for Coin Operated Vending Machine Robbery is very simple, but it does work. Part 3 – How to get free Candy and chips and stuff. This only works on two types of machines. 1 – The type that have the 25 cent gumballs, or the M&M’s, or peanuts and other shit.

popularity contest - Tweetable Mathematical Art OK, this one gave me a hard time. I think it's pretty nice though, even if the results are not so arty as some others. That's the deal with randomness. Maybe some intermediate images look better, but I really wanted to have a fully working algorithm with voronoi diagrams. This is one example of the final algorithm. The image is basically the superposition of three voronoi diagram, one for each color component (red, green, blue). Code ungolfed, commented version at the end unsigned short red_fn(int i, int j){int t[64],k=0,l,e,d=2e7;srand(time(0));while(k<64){t[k]=rand()%DIM;if((e=_sq(i-t[k])+_sq(j-t[42&k++]))<d)d=e,l=k;}return t[l];} unsigned short green_fn(int i, int j){static int t[64];int k=0,l,e,d=2e7;while(k<64){if(! It took me a lot of efforts, so I feel like sharing the results at different stages, and there are nice (incorrect) ones to show. First step: have some points placed randomly, with x=y Second: have a better y coordinate 3rd: I don't remember but it's getting nice 4th: scanlines

Related: Math Club