1. Brain Teasers And Math Puzzles : Puzzle & Brain Teaser Collection Puzzles and math brain teasers online, dynamic and interactive. http://www.syvum.com/teasers/

Syvum Home K-12 GMAT GRE ... Search this site document.writeln(''); SYVUM ESPAÑOL SYVUM BRAZIL Language Learning Trivia Contest ... 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. Math Puzzles Almost all puzzles were told to us by a computer/math genius Vlad Mitlin . Please email us your comments and new puzzles cherk@math.utah.edu. Enjoy! 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

3. A Few Algebraic Math Puzzles A collection of puzzles at high school level. Does not include answers. http://www.lifesmith.com/mathpuz1.html

Math Puzzles #1 Home Art Math Business 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:

4. 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

Username: Password: Sites for teachers Sites for parents Awards Interactive Activities ... Sites for parents Interactive Mathematics Miscellany and Puzzles Raymond Smullyan, a Mathematician, Philosopher and author of several outstanding books of logical puzzles, tells, in one of his books, a revealing story. A friend invited him for dinner. He told Smullyan that his teenage son was crazy about Smullyan's books and could not wait to meet him. The friend warned Smullyan not to mention that he is a Mathematician and that Logic is a part of Mathematics because the young fellow hated Mathematics. Having told this story, would it be wise to announce up front what this site is about? Perhaps against a better judgement, I've put together a manifesto that aims to explain the purpose of this site. Did you know that... The banner is clickable Arithmetic Base Conversion Divisibility Criteria Euclid's Game Fast Arithmetic Tips ... And much much more ... Logic Lewis Carroll's Logic Game Venn Diagrams And more ... Color Cycling on Mandelbrot ... And more ... Fallacies Curry's Paradox Delian Problem Solved A Faulty Dissection Langman's Paradox ... Rouse Ball's Fallacy Calculus Equations of the Straight Line Function, Derivative and Integral

5. MathPuzzle.com Celebrates math puzzles and mathematical recreations. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

6. Interactive Mathematics Miscellany And Puzzles, Games Page MathPuzzle.comMath Games, math puzzles, and Mathematical Recreations. http://www.cut-the-knot.org/games.shtml

Username: Password: Sites for teachers Sites for parents Awards Interactive Activities ... Sites for parents Interactive Mathematics Miscellany and Puzzles Games and Puzzles (Please note that a good deal of the topics below are accompanied by interactive Java illustrations and, thus, require a Java enabled browser. Some of the Java applets are combined into thematic bundles and are available for sale . This is mostly done for teachers of mathematics who wish to enliven their web pages or classroom presentation. Let us know if you would like to obtain an applet not included into the current roster.) 3 glass puzzle [JavaScript] 3 glass puzzle , second, more general tool [JavaScript] Three Jugs Problem [Java] 4 Knights [Java] [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] Coin Game [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 Items Simultaneously [Java] Flipping Items Simultaneously II [Java] Flipping pancakes [Java] Gergonne Magic Trick [Java] Gordian Knot Grundy's Game [Java] The Happy 8 puzzle. [Java]

7. Brain Teasers And Math Puzzles Puzzle Brain Teaser Collection Puzzles and math brain teasers online, dynamic and interactive. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

8. Links Nishio s selfportrait. WIMS, by XIAO Gang. A wide assortment of interactive math puzzles and utilities. Other Links. News CNN,ABCNews, Washington Post, 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)

9. Cool Math .com - An Amusement Park Of Math And More! Coolmath has a ton of cool math games and puzzles, lots of really clear math lessons (Algebra and fractions), fractals, Calculus, Geometry http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

10. BrainBashers Puzzles And Brain Teasers Brain teasers, puzzles, riddles, games and optical illusions. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

11. A Plus Math Helps students improve their math skills interactively with flashcards and games. Also provides worksheets and homework help. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

12. Math Goodies Free Math Help, Interactive Math Lessons, Homework Features interactive math lessons, homework help, worksheets, puzzles, message boards, and newsletters. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

13. Math Marbles and Row Puzzle Mahjongg Puzzle math puzzles (from Discovery School) Triple Quintzee (like yahtzee) Zig Zag http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

14. Game-Master.us Riddles, games, cryprograms, math puzzles, and forums. http://game-master.us/

News Forums Cryptogram Projects ... Gallery A place for cryptograms, rose information, programming and other geek stuff. I haope you enjoy your stay. -GameMaster P.S. Here's a link to the old site

15. EdHelper.com - Math, Reading Comprehension, Themes, Lesson Plans Math Middle School Math Algebra Kindergarten High School Animals Create time lines. Graphs. Make Crossword Puzzles. Daily Skills Review. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

16. Math Forum: Math Puzzles Back to Math Problems, Puzzles, Tips Tricks Math Line Puzzles. Can you connect the dots in a 3x3 grid using 4 straight lines? http://mathforum.org/k12/k12puzzles/

K-12 Math Puzzles from the Math Forum Back to 2005 Puzzle 2004 Puzzle 2003 Puzzle 2002 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

17. Math.com - World Of Math Online Offers free math lessons and homework help, with an emphasis on geometry, algebra, statistics, and calculus. Also provides calculators and games. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

18. The Math Forum Home Page The Math Forum is the comprehensive resource for math education on the Internet. Some features include a K12 math expert help service, an extensive http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

19. Math Puzzles From Math Goodies Interactive math puzzles, math crosswords, math printables and solutions for each. http://www.mathgoodies.com/puzzles2004/

math puzzle click here computer puzzle CD Lessons Homework Puzzles ... Newsletter numbers Worksheets Forums Articles Home Ed ... Catalog Check out our new Puzzle Library! We have interactive crosswords with 3 levels of difficulty, printables, and solutions for all. You need Java enabled in your browser to use our interactive crosswords. THEME INTERACTIVE CROSSWORDS PRINTABLES Level 1 Level 2 Level 3 Solution Crossword Solution Circles Online Online Online Online ... Online Integers Online CD-ROM CD-ROM CD-ROM ... CD-ROM Logic Online CD-ROM CD-ROM CD-ROM ... CD-ROM Number Theory Online CD-ROM CD-ROM CD-ROM ... CD-ROM Percent Online CD-ROM CD-ROM CD-ROM ... CD-ROM Polygons Online CD-ROM CD-ROM CD-ROM ... CD-ROM Pre-Algebra Online CD-ROM CD-ROM CD-ROM ... CD-ROM Probability Online CD-ROM CD-ROM CD-ROM ... CD-ROM Statistics Online CD-ROM CD-ROM CD-ROM ... Recommend This Page! Join our free Math Goodies Newsletter! Name: Email Address: Your position: Teacher Math Dept Chair Technology Coord Principal District Level Higher Ed Homeschooler Parent Student None of the above Your grade or level: K-2 K-12 College or University State or Province: Country: Delivery Format: HTML TEXT Manage Subscriptions Software Study Smart MathType ... Recommend numbers Advertise About Us Search Press ... Polls calculus geometry trigonometry algebra Last Modified 02 Sep 2005 basic math pre-algebra pre-calculus adult learners

20. Nick's Mathematical Puzzles The math puzzles presented here are selected for the deceptive simplicity I usually provide only a proximate credit; some math puzzles have been around http://www.qbyte.org/puzzles/

Puzzles: Index Home About Accessibility RSS What's this? 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 116 onwards The math 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, trigonometry, 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 related mathematical topics. Further references are provided with many of the solutions. The puzzles are intended to be fun, with an educational element. Each puzzle is assigned a level of difficulty of between one and four stars, with four being the most difficult. Clearly this is to some extent subjective, but it may be useful as a rough guide. The source for each problem is given at the bottom of the solution page. I usually provide only a proximate credit; some math puzzles have been around for so long it can be difficult to trace their provenance. However, if I know the original source, such as when a puzzle is a recognized mathematical theorem, I credit that source.

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