1. Brain Teasers And Math Puzzles : Puzzle & Brain Teaser Collection Interactive puzzles to challenge logic and mathematical skills. Immediate feedback with detailed solutions is provided. http://www.syvum.com/teasers/

Syvum Home K-12 GMAT GRE ... More... '); document.writeln(' '); document.writeln(' Syvum Family Fun Zone : Brain Teasers Brain Teasers and Math Puzzles $$$ WIN PRIZES $$$ : Enter Syvum Quizenius CONTEST NOW ! Try our Word Puzzles Hot Try our IQ Test This page contains the ever-growing list of brain teasers and math puzzles on Syvum. All the brain teasers and math puzzles are interactive with immediate scoring. The brain teasers and math puzzles as well as their explanations use dynamic content to provide continuous learning and entertainment. Level of Difficulty: : Easy : Medium : Challenging YOU CAN CONTRIBUTE TOO ! Brain Teaser : Family Ties NEW Contributed by Natalie King Brain Teaser : In a Circle NEW Contributed by Natalie King Brain Teaser : Checkered Square Contributed by Nathan Burns Brain Teaser : The Pole in the Lake Contributed by Alfredo Garza Math Puzzle : Sum of Squares Contributed by Raymond Lu Brain Teaser : Ann and the Real Estate Agent Contributed by Roque A. Estevez Math Puzzle : The Rectangle at the Corner Contributed by Raymond Lu Brain Teaser : Bags of Dollars Contributed by Doug Briggs Math Puzzle : The String on the Cylinder Contributed by Raymond Lu Brain Teaser : The Hare and the Tortoise Brain Teaser : Old Man Wrinkle Brain Teaser : Your Piggy Bank Brain Teaser : Black or Brown Gloves ... Brain Teaser : Bicycles or Tricycles ?

2. Mathpuzzle.com Martin Gardner celebrates math puzzles and Mathematical Recreations. If you ve made a good, new math puzzle, send it to ed@mathpuzzle.com. http://www.mathpuzzle.com/

Fair Dice Iamonds Eternity Mazes ... Chaos Tiles , and Partridges www mathpuzzle Mathematica Mathematical Explorer MathWorld mathforge.net ... Math Games Material added 05 Jun 2004 The Bureaucratic Nightmare is a maze through red tape. Robert Abbott: "Just wanted to let you know that there is now an interactive version of the Bureaucratic Maze that you can play on-line. It's called the Bureaucratic Nightmare and it was created by Eric Shamblen. To try it, go to my home page: http://logicmazes.com/ then go to the "What's new" banner at the top, and follow the pointer." excellent series of wrapping puzzles The Mathematics of Futurama is worth a look. I also like the cartoon on self-assembly at howtoons.net I'll be attending the Wolfram Technology Conference in Champaign IL on October 21-23. I'll be glad to show my puzzle collection and the periodic table to anyone attending. Material added 29 May 2004 2^24036583 - 1 is prime. A full news release on the discovery can be seen at mersenne.org Material added 23 May 2004 Jan Kristian Haugland is offering $100 in potential prizes to people that can better his current finds in Grid Subgraphs Jean-Charles Meyrignac: Just to mention that I recently (11/11/2003) found a 9x8 grid with french words. In France, it's considered as the Holy Graal by crossword makers (verbicrucistes in french) !

3. Math Puzzles math puzzles. Andrej s homepage Elena s homepage . Please email us your comments and new puzzles cherk@math.utah.edu. Enjoy! Andrej and Elena. 1. Coins. http://www.math.utah.edu/~cherk/puzzles.html

Math puzzles Andrej's homepage Elena's homepage These puzzles do not require any mathematical knowledge, just logical reasoning. Check, how smart you are. If you cannot solve them, take it easy. Almost all puzzles were told to us by a computer/math genius Vlad Mitlin . Visit us again: we intend to place here new puzzles and the solutions. Please email us your comments and new puzzles: cherk@math.utah.edu. Enjoy! Andrej and Elena 1. Coins There are 12 coins. One of them is false; it weights differently. It is not known, if the false coin is heavier or lighter than the right coins. How to find the false coin by three weighs on a simple scale? Solution: Click here 2. Bridge crossing This problem was recently published in MAA on line: Crossing a Rickety Bridge at Night By Flashlight. A group of four people has to cross a bridge. It is dark, and they have to light the path with a flashlight. No more than two people can cross the bridge simultaneously, and the group has only one flashlight. It takes different time for the people in the group to cross the bridge: A nnie crosses the bridge in 1 minute

4. Math Goodies: Free Interactive Math Lessons, Homework Help, Worksheets, Puzzles Free educational web site featuring interactive math lessons with a problemsolving approach and actively engage students in the learning process. Also offer a math chat board, math puzzles, a math image library, educational links, and homework suggestions. http://www.mathgoodies.com/

interactive click here fun Lessons CD Forums Homework ... Newsletter numbers Advertise Recommend Puzzles About Us ... Articles Math Goodies is a free math help site featuring interactive lessons, homework help, worksheets and forums! We have over 400 pages of activities for students, teachers and parents. Our award-winning site has been reviewed on television, radio, and in major newspapers including The Washington Times. Join our growing community and subscribe to our free newsletter ! We'll keep you informed of the latest math news and site updates while respecting your privacy THE MATH GOODIES NEWSLETTER Join Help Under 13? Privacy FEATURE OF THE WEEK Try our Homework Help Forum! THE MATH GOODIES CD version 3! Get our Complete Lesson Library on CD! FREE DEMO LESSONS Introduction to Statistics Topics in Pre-Algebra Probability Integers ... Number Theory FORUMS The best place for math discussions ABOUT THIS SITE CHILD SAFETY LINK TO US ... WHO IS MRS. GLOSSER?

5. Interactive Mathematics Miscellany And Puzzles math puzzles. Interactive education. A lot of math information for teachers, students and parents. Work out and enjoy mathematics. http://www.cut-the-knot.org/index.shtml

6. Interactive Mathematics Miscellany And Puzzles, Games Page math puzzles. Interactive education. Games and Puzzles. Most illustrated with Jva applets. CTK Exchange Front Page Movie shortcuts http://www.cut-the-knot.org/games.shtml

CTK Exchange Front Page Movie shortcuts Personal info ... Recommend this site Interactive Mathematics Miscellany and Puzzles Games and Puzzles 3 glass puzzle [JavaScript] 3 glass puzzle , second, more general tool [JavaScript] 4 Knights [Java] 7 Coins Puzzle [Java] A Baffling Prediction The Aliquot Game [Java] Bachet's Magic Trick [Java] The Blithe 12 puzzle [Java] Bogus Nim [Java] Box Labels [Java] Calendar Magic [Java] Changing Colors [Java] Cryptarithms [JavaScript, Frames] Date Game [Java] Euclid's Game [Java] Farmer and Wife To Catch Rooster and Hen [Java] The game of Fif [Java] Fish Soup Game [Java] Flipping pancakes [Java] Gergonne Magic Trick [Java] Gordian Knot The Happy 8 puzzle. [Java] Invitation to MasterMind [Java] Jam [Java] A legend of Josephus Flavius [Java] Kayles [Java] Latin Squares [Java] Lewis Carroll's problem [JavaScript] Looping Chips [Java] The Lucky 7 puzzle. [Java] Magic in Square [Java] The Magic Squares game [JavaScript, Frames] Merlin's Magic Squares [Java] A Matter of Age Mazes [Java] Monty Hall Dilemma [JavaScript] The game of Nim explained [JavaScript, Frames]

7. Links Nishio s selfportrait. WIMS, by XIAO Gang. A wide assortment of interactive math puzzles and utilities. FAQs Game Design, Cryptography,Puzzles,Math,Scrabble. http://www.mathpuzzle.com/Links.html

MATH LINKS Puzzle Links Other Links Math Resources Eric Weisstein's Mathworld functions.wolfram.com GAP WWW Interactive Mathematics Server (WIMS) ... Mathematical Atlas WWW Interactive Mathematics Server (WIMS) at http://wims.unice.fr/ by XIAO Gang, is fantastic. There are many marvelous tools here, including a Matrix calculator (determinant, characteristic polynomials, eigenvalues), a Function calculator (provides derivatives, integrals, and graphs), Factoris (factors integers and polynomials), Contfrac (gives continued fractions), a Base converter (In ternary, Pi = 10.010211012222010211002 ... ), (allows geometric constructions), Sigma (computes finite and infinite sums), a Gallery of plots , and many math exercises. Visual Mathematics Sodaplay Miroslav Vicher's polyforms Group Games String Figures ... Story of Mathematics Online Math Books Book Recommendations Mathworld (formerly CRC Encyclopedia of Mathematics) Around Godel's Theorem Games of No Chance ... generating functionology Other Sites Mathematica MathSoft Ivars Peterson's MathTrek Golomb Rulers ... USA Mathematical Talent Search Math Problems Math Contest (motivational questions) Hexi Puzzle Links Daily Puzzles Scrabble Challenge Ricochet Robot Challenge Mind Sports Olympiad Set ... Mental State Weekly Puzzles Macalester College Problem of the Week SMSU Problem Corner Paint by Numbers Primrose Lodge ... The NPR Puzzle of the Week Monthly Puzzles Math Magic IBM Research USA Mathematical Talent Search (quarterly)

8. Syvum Homepage: Online Education And Interactive Learning Christmas Santa Claus , Christmas Carols , Reindeer Contributions English , Math , Puzzle , Spanish math puzzles Numbers , Tangents , Add Quick http://www.syvum.com/

Syvum Home K-12 GMAT GRE ... More... '); document.writeln(' '); document.writeln(' Syvum Homepage : Online Education and Interactive Learning worldwide to over 150 countries ! $$$ WIN PRIZES $$$ : Enter Syvum Quizenius CONTEST NOW ! Membership: Become a Syvum Premier Member for only $ 9.99 Algebra Equations Expansions Factoring ... People Special Features at Syvum Author Quizzes Learning System For Teachers Member Benefits ... SyvumClick TM Buy our Software Kids Math SyvumBook I Age: 6-7 Try Online Word Problems SyvumBook II Age: 8-9 Try Online Kids English SyvumBook III Age: 9-10 Try Online More at Secure Web Shop Hot Favorites at Syvum CONTRIBUTIONS GRE Test Prep SAT Test Prep Puzzles ... US Quizzes New at Syvum Algebra : Equations Word Games : Jugglets SAT : Vocabulary GRE : Antonyms ... Puzzle : Checkered Square Featuring a New Story Adventures in Aipotu "A fable to discover our world" - by Sanat Mohanty $$$ WIN $$$ PRIZES Enter Syvum Quizenius CONTEST NOW ! fiSearchFormMaxSetId='AX005650'; Suppress Pop-ups Online Translation - Dictionary One-Click Lookups Contact Info

9. Interactive Mathematics Miscellany And Puzzles, Games Page math puzzles. Interactive education. Games and Puzzles. Most illustrated with Jva applets MSET99 Talk. Games Puzzles. Arithmetic/Algebra. Geometry Math Poll. Other Math sites. Guest book . http://www.cut-the-knot.com/games.html

CTK Exchange Front Page Movie shortcuts Personal info ... Recommend this site Interactive Mathematics Miscellany and Puzzles Games and Puzzles 3 glass puzzle [JavaScript] 3 glass puzzle , second, more general tool [JavaScript] 4 Knights [Java] 7 Coins Puzzle [Java] A Baffling Prediction The Aliquot Game [Java] Bachet's Magic Trick [Java] The Blithe 12 puzzle [Java] Bogus Nim [Java] Box Labels [Java] Calendar Magic [Java] Changing Colors [Java] Cryptarithms [JavaScript, Frames] Date Game [Java] Euclid's Game [Java] Farmer and Wife To Catch Rooster and Hen [Java] The game of Fif [Java] Fish Soup Game [Java] Flipping pancakes [Java] Gergonne Magic Trick [Java] Gordian Knot The Happy 8 puzzle. [Java] Invitation to MasterMind [Java] Jam [Java] A legend of Josephus Flavius [Java] Kayles [Java] Latin Squares [Java] Lewis Carroll's problem [JavaScript] Looping Chips [Java] The Lucky 7 puzzle. [Java] Magic in Square [Java] The Magic Squares game [JavaScript, Frames] Merlin's Magic Squares [Java] A Matter of Age Mazes [Java] Monty Hall Dilemma [JavaScript] The game of Nim explained [JavaScript, Frames]

10. Math Forum: Math Puzzles K12 math puzzles from the Math Forum. Back to Math Problems, Puzzles, Tips Tricks http://mathforum.com/k12/k12puzzles

K-12 Math Puzzles from the Math Forum Back to 2004 Puzzle 2003 Puzzle 2002 Puzzle 2001 Puzzle ... 1998 Puzzle - Judy Ann Brown ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for the counting numbers 1 through 100. All the King's Digits - Terry Trotter 1997 Puzzle - Ruth Carver - 1996 Puzzle Challenge: Using the digits in 1997 or 1996 and any operations, try to write equations that have the numbers from to 100 as the answer. Four 4's Puzzle - Ruth Carver Challenge: Using four 4's and any operations, try to write equations that have the numbers from to 100 as the answer. Math Line Puzzles Can you connect the dots in a 3x3 grid using 4 straight lines? Can you figure out how to plant 7 rosebushes so that they form 6 straight lines with 3 rosebushes in each line? Or 10 bushes in 5 lines with 4 in each? How about 19 in 9 lines with 5 in each? Can you construct 9 triangles by drawing 3 straight lines through a capital M? Can you move exactly two toothpicks to form four 1x1 squares? Critical Thinking Puzzles A selection of brain teasers from Michael DiSpezio's new book

11. Index Free math puzzles and spelling game designed for students, teachers, parents and others. Weekly word creation contest. Complete with all you need to utilize the learning tools. http://web.pdx.edu/~manchest

Vance and Art's SpellBound Game and Math Puzzles and Games Page. CHECK OUT THE HOT NEW LINKS BELOW! Action Research Project and Paper In a Nutshell Action Research Page Teacher and Student Statements Diagonal Problem Solving Page THESE LINKS ARE STILL GOOD TOO. UPDATES ARE BEING DONE ON EVERY PAGE. Home Page Personal Background SpellBound Game Math Puzzles and Games ... Visitor Feedback The purpose of this web site is to provide educators, parents, students and others with two resources that promote student motivation and learning. These learning tools are FREE! Both of these are unique and a lot of fun. Lesson plans can be found on the Lesson Plan page. My action research project showed that students preferred my math and spelling game activities to their regular activities in those areas. If you would like to see the results of my action research project just click here. If you would rather see the results in a nutshell then click here. There is also a weekly contest for the SpellBound game . Check out the link at the bottom of the page for all of the details. Please note that the SpellBound contest is discontinued until September.

12. A Few Algebraic Math Puzzles math puzzles 1 logoHome. This section is for math teachers, math students, and lovers of math puzzles. We hope that these puzzles http://www.lifesmith.com/mathpuz1.html

Math Puzzles #1 Home This section is for math teachers, math students, and lovers of math puzzles. We hope that these puzzles, which will change monthly, will keep you and/or your students busy for hours! The answers to these will be posted when the succeeding set of problems are posted. Good luck! 1) Find all solutions of this system of equations: x + yz = 6 y + xz = 6 z + xy = 6 2) Find the ordered pair (x,y) that satisfy: sqrt(21/4 + 3 * sqrt(3)) = x + sqrt(y) where sqrt means square root. 3) Find all ordered pairs of real numbers (x,y) that satisfy: 2x^2 - 2xy + y^2 = 2 3x^2 + 2xy - y^2 = 3 4) Factor 5^1995 - 1 (that's five to the 1995th power) into a product of three integers, such that each factor is greater than 5^100. 5) Find all ordered pairs of real numbers (a,b) for which: 3 * sqrt(x - 2y) + 3 / sqrt(x - 2y) = 10 x = ay + b 6) The points of intersection of the graphs of xy = 20 and x^2 + y^2 = 41 are joined to form a convex quadrilateral. Find the area of that quadrilateral. 7) Find all ordered triples of real numbers (x,y,z) that satisfy: sqrt(x - y + z) = sqrt(x) - sqrt(y) + sqrt(z) x + y + z = 8 x - y + z = 4 8) Find all ordered triples of real numbers (x,y,z) that satisfy:

13. Math Forum: K-12 Problems, Puzzles, Tips & Tricks Sets of math problems and puzzles, and computation tips and tricks to speed up your calculations. math puzzles. Number Line Puzzles. http://mathforum.org/k12/mathtips/

Student Center Teachers' Place Calculation Tips Problems ... Puzzles See also the Math Forum's Internet Mathematics Library list of math problems and puzzles on the Internet, and our Teacher2Teacher FAQ: Tricks for Learning Math. Download an archive for local viewing of the following tips and tricks: Mac or Windows Calculation Tips Doing Math in Your Head Beat the Calculator - BEATCALC! More than 400 mental calculation tricks from the BEATCALC mailing list Divisibility Rules for numbers 3-13 Why do these rules work? Multiplication Tips Hints for multiplying by 5, 9, and 11 Math Problems Russian Math Olympiads St. Petersburg, Russia 20 problems from the Palace of Youth Creativity Vologda, Russia 28 problems for grades 5-11 MathPro Online MathPro Online Reference to Mathematical Problems Math Puzzles Number Puzzles Math Line Puzzles Exploring Facts, Uncovering Connections Critical Thinking Puzzles Brain teasers from Michael DiSpezio's book Home The Math Library Quick Reference Search ... Contact Us http://mathforum.org/

14. Stephen Jordan's Homepage Graduate student at MIT. Physics and math puzzles, scientist quotes, and personal information. http://web.mit.edu/sjordan/www

Stephen Jordan's Homepage BS in Physics 2003 Penn State Currently PhD student in Physics at MIT Presently I study quantum algorithms. Previously I have worked on condensed matter experiment and simulation. Quantum Algorithms It is now believed that quantum computers can solve certain problems more efficiently than classical computers. For example, quantum algorithms have been discovered which can factor large numbers in an amount of time which varies roughly as the cube of the number of digits. No classical algorithm with such efficiency is known and many people suspect that it is mathematically impossible for one to exist, although no one has yet succeeded in proving this. Quantum algorithms superior to all known classical algorithms have been discovered for several problems, and in a small number of cases, the superiority of quantum techniques has been rigorously proven. However, the full power of quantum computers relative to classical computers is still largely unknown, and the search for new quantum algorithms remains active. My own research has so far involved quantum numerical algorithms. Specifically, I found that it is possible to perform numerical gradient estimation in any number of dimensions using two function evaluations, whereas classically the required number of function evaluations scales linearly with the dimensionality. I completed this research at MIT, where I have been enjoying the advice and insights of

15. Math Forum: Math Puzzles K12 math puzzles from the Math Forum. Back to Math Problems, Puzzles, Tips Tricks. 1999 Puzzle - Judy Brown. Use Math Line Puzzles. Can http://mathforum.org/k12/mathtips/math.puzzles.html

K-12 Math Puzzles from the Math Forum Back to 1999 Puzzle - Judy Brown ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for the counting numbers 1 through 100. 1998 Puzzle - Judy Brown ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for the counting numbers 1 through 100. 1997 Puzzle - Ruth Carver Challenge: Using the digits in 1997 and any operations, try to write equations that have the numbers from to 100 as the answer. Four 4's Puzzle - Ruth Carver Challenge: Using four 4's and any operations, try to write equations that have the numbers from to 100 as the answer. 1996 Puzzle - Ruth Carver Challenge: Using the digits in 1996 and any operations, try to write equations that have the numbers from to 100 as the answer. Math Line Puzzles Can you connect the dots in a 3x3 grid using 4 straight lines? Can you figure out how to plant 7 rosebushes so that they form 6 straight lines with 3 rosebushes in each line? Or 10 bushes in 5 lines with 4 in each? How about 19 in 9 lines with 5 in each? Can you construct 9 triangles by drawing 3 straight lines through a capital M?

16. Math Puzzles math puzzles. Mathmania. Math Problems Puzzles. Brain Teasers. Puzzle Corner. Interactive math puzzles. Kids Place at Cuisenaire. Magic Squares. http://www.nhusd.k12.ca.us/ALVE/ace/MATH/Math_Puzzles.html

Math Puzzles Mathmania Brain Teasers Puzzle Corner Interactive Math Puzzles ... Mazes and Mathematics

17. Brian's Main Page Programming and math puzzles, as well as songs from his album. http://www.ugcs.caltech.edu/~brothste/

Brian's Awesome Web Page Programming/Math Challenges SET (card game) Top Ten Things To Do When Going On A Long Drive Songs from my album.

18. Nick's Mathematical Puzzles All require a certain ingenuity, but usually only precollege math. Some puzzles are original. I also welcome new math puzzles. http://www.qbyte.org/puzzles/

Puzzles: Index Home Introduction Accessibility Site search: Nick's Mathematical Puzzles Welcome to my selection of mathematical puzzles. I aim to add one new puzzle each week, so please stop by again. What's new? See puzzles 78 through 80 , and puzzle 81 onward The puzzles presented here are selected for the deceptive simplicity of their statement, or the elegance of their solution. They range over geometry, probability, number theory, algebra, calculus, and logic. All require a certain ingenuity, but usually only pre-college math. Some puzzles are original. Explaining how an answer is arrived at is more important than the answer itself. To this end, hints, answers, and fully worked solutions are provided, together with links to relevant mathematical topics. Further references are provided with many of the solutions. The puzzles are intended to be fun, with an educational element. Some of these puzzles I first encountered on Clifford Pickover's Yahoo! Group , host to fascinating discussions on mathematics, science, art, religion, philosophy, and the extraordinary. Where this is the case, I provide a link in the credit, which is at the bottom of the solution page. (However, since the group's messages are accessible to members only, you would need to join the group in order to follow the link.) I usually provide only a proximate credit; some puzzles have been around for so long it can be difficult to trace their provenance. I welcome feedback of any kind. Should you find a puzzle ambiguous, a hint misleading, an answer incorrect, or a solution unclear, please let me know. I also welcome

19. Brain Teasers Offers new math puzzles each week. Designed for students in grades 37. http://www.eduplace.com/math/brain/

Children's Privacy Statement Kids' Place Questions Kids Ask Questions and Comments ... Site Index You may download, print, and make copies of these pages for use in your classroom, Terms and Conditions of Use

20. Puzzles & Problems Aims Puzzle Corner. Aims Puzzle Corner, intended for students in grades K6, is a list of monthly math puzzles for 1995 and 1996. 5 Math Line Puzzles . http://www.sitesforteachers.com/resources_sharp/math/math_puzzles.html

Adam's Puzzles. Adam's Puzzles contains over 30 puzzles for high school students with a strong background in calculus and geometry. Detailed answers are provided with a complete explanation. Aims Puzzle Corner. Aims Puzzle Corner, intended for students in grades K-6, is a list of monthly math puzzles for 1995 and 1996. You can request solutions via email. Algebra Online. Algebra Online is a service designed to allow students throughout the world to receive free private tutoring. To get online help in algebra, click here Alvirne High School. Alvirne High School's in Hudson, N.H. calculus class invites you to join them in their preparation for the AP exam. The site contains Alvirne's and guest problems of the week, and archives for Alvirne, guest, and student problems with solutions. Included also are sample multiple choice AP calculus questions and solutions, student and teacher calculus resources on the Web, and general information about AP exam Appetizers and Lessons for Math and Reason. Appetizers and Lessons for Math and Reason for the high school math student shows how to use rules and patterns in solving logic/math problems. Among its offerings are arithmetic review problems skills for problem solving in algebra , and problem solving methods for logic puzzles, theorems, and other math topics.

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