Welcome to Logic-Puzzles.org, the world's largest web site devoted to logic puzzles! We've got more than 25,000 unique puzzles available for play, both online and the old fashioned way - with pencil and paper. Feel free to solve online just for fun, or, for an added challenge, register a free account and compete against thousands of other solvers to make it into our Logic Puzzle Hall of Fame! Solve a Logic Puzzle » Logic puzzles come in all shapes and sizes, but the kind of puzzles we offer here are most commonly referred to as "logic grid" puzzles. In each puzzle you are given a series of categories, and an equal number of options within each category.

Amazing Kids! Penpals Program » Amazing Kids! - Dream Big The Amazing Kids! PenPals Program is a literacy-based, traditional letter writing pen pal program, available to all children ages 5-17 worldwide. At \$10 per child, per pen pal, our program is a low-cost (and fun!) way to help your child practice their literacy skills, while making a new friend. Teachers or groups of 15 or more receive a 50% discount, at just \$5 per child. Some scholarships are available; just ask! Printable Logic Puzzles Printable Logic Puzzles Logic puzzles (also known as "logic grid puzzles") require the solver to deduce the relationships between different people, places and things based on a limited number of clues given in the puzzle. Remember: every item on the board belongs to one and only one person, no item will ever be shared.

AIMS Puzzle Corner: Free Math Puzzles This week’s Puzzle Corner activity is a magic trick with a mathematical, as well as a slight-of-hand, component. I first came across this trick in one of Martin Gardner’s many books on recreational mathematics. I liked it so much that I have been stumping students, friends, and family members with it ever since. In order to make this trick work, you will need to practice it by yourself until the moves (illustrated at bottom) become automatic, before trying it out on someone else. Its success, like the success of many magic tricks, depends on diverting the audience’s in this case, your students’ attention. Modern X-ray technology reveals Archimedes' math theory under forged painting Stanford Report, August 9, 2006 Archimedes Palimpsest Project Bergmann, left, and Noel place fragments from the Archimedes Palimpsest in front of the X-ray beam. A scan of the palimpsest reveals vertical text hidden beneath the paint. Multispectral imaging revealed that Archimedes was well on his way to developing calculus, nearly 1,000 years before Isaac Newton. After more than 1,000 years in obscurity, the last unreadable pages of the works of ancient mathematician Archimedes are being deciphered, thanks to the X-ray vision at the Stanford Linear Accelerator Center (SLAC), which Stanford operates for the U.S.

Anthem Essay Contest — Ayn Rand Education Anthem Essay Contest Information Topics Select ONE of the following three topics: In Chapter 8, why does Equality laugh when he remembers that he is "the Damned"? The Seemingly Impossible Escape – Sunday Puzzle – Mind Your Decisions Here is a logic puzzle that depends on the game theory concept of common knowledge. Can you figure it out? Alice and Bob are taken prisoners by an evil logician. They are given one chance to be set free. Alice and Bob are placed in cells that have a view of a courtyard with trees.

Unicode strikethrough text tool for Twitter, Facebook, internationalized domain names, etc. Create s̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶ text on Twitter, Facebook, internationalized domain names, etc. This little tool generates s̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶ text using unicode characters. While the text it generates may look similar to text generated using the <strike> HTML tag or text-decoration:line-through CSS attribute, it isn't*. Mathematics Skoool.co.uk A fantastic free resource to support maths and science at Key Stages 3 and 4. There are wonderful interactive activities and study notes. Pupils can download the resources for offline use. Interactive whiteboard resources too.

The Fountainhead Essay Contest — Ayn Rand Education The Fountainhead Essay Contest Information Topics Select ONE of the following three topics: At the end of Part II, Ellsworth Toohey confronts Howard Roark and says, "Mr. How Many Liars Are At The Party? Sunday Puzzle – Mind Your Decisions At a party there are 100 people who are either liars or truth tellers. Liars always lie and truth tellers always speak the truth, and each person can identify the type of others. After the party is over, you ask each person, “How many truth tellers did you shake hands with?” Each person gave a different whole number answer from 0 to 99 (the answers were 0, 1, 2, …, 98, 99). How many liars were at the party? Watch the video for a solution.

Cricket Magazine - www.CricketMagKids.com - New Contest Ah! The dog days of summer are here at last, with their long, warm, sunny afternoons. What a perfect time to venture outdoors with your camera!

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