81. Flooble :: Perplexus :: Logic Puzzles, Brainteasers, Riddles And Math Tricks go here perplexus.info logic puzzles, brainteasers, riddles and math tricks Difficulty 1 of 5 A Fruity Kind of Problem (in General) http://www.flooble.com/perplexus/

All about flooble fun stuff Get a free chatterbox ... Avatars Notice: this site has moved to perplexus.info That's right - we now have our own new domain. These pages will eventually stop working, so please update your bookmarks! To access this page on the new site, go here: perplexus.info :: logic puzzles, brainteasers, riddles and math tricks (Your old login and password will still be valid on the new site) Home Welcome to perplexus.info , flooble's perplexing puzzle portal. Here, we collect all sorts of puzzles, from simple logic questions and word tricks to in-depth math problems like probability and geometry. Click around and see if your brain is up to the task! If you're new here, make sure you sign up so that you can leave comments and submit your own problems! Categories All Problem Categories Latest: Self-Referential Numbers (in Numbers A nine digit number has the property where the first digit equals the number of zeros and ones used in the number, the second digit equals the number of ones and twos used in the number, the third digit equals the number of twos and threes used in the number, etc. through the ninth digit equals the number of eights and nines used in the number. What could the number be? A ten digit number has a similar property to the nine digit number. The first digit equals the number of zeros and ones used in the number, the second digit equals the number of ones and twos used in the number, etc. through the ninth digit. And also, the tenth digit equals the number of zeros and nines used in the number. What could this number be?

82. Flooble :: Perplexus :: Puzzle Categories To access this page on the new site, go here perplexus.info puzzle categories (Your old login and password will still be Just math (193 problems) http://www.flooble.com/perplexus/tree.php

All about flooble fun stuff Get a free chatterbox ... Avatars Notice: this site has moved to perplexus.info That's right - we now have our own new domain. These pages will eventually stop working, so please update your bookmarks! To access this page on the new site, go here: perplexus.info :: puzzle categories (Your old login and password will still be valid on the new site) Home Categories Below is the list of categories of puzzles and problems available on flooble :: perplexus. If you think we are missing a category, feel free to let us know. Or just submit a problem, and if it fits none of the categories shown, we will be forced to add a new one just for you! Finally, if you're not sure which category to go to, just jump to a random problem Problem category tree Home (Top Level) Logic (190 problems) Liars and Knights (54 problems) Weights and Scales (48 problems) Probability (116 problems) Shapes (109 problems) Geometry (130 problems) General (188 problems, 1 new Tricks (32 problems) Word Problems (97 problems

83. Interactive Mathematics Miscellany And Puzzles math puzzles. Interactive education. A lot of math information for teachers, Games puzzles Three Jugs Problem Box Labels Fish Soup game 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

84. Interactive Mathematics Miscellany And Puzzles, Arithmetic And Algebra math puzzles. Interactive education. Arithmetic and Algebra. mathematician A Practical Arithmetic Problem Pythagorean Triples Java http://www.cut-the-knot.org/algebra.shtml

Username: Password: Interactive Mathematic Miscellany and Puzzles Arithmetic and Algebra What Is Arithmetic? What Is Algebra? (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-Colors Tower of Hanoi [Java] 3 glass puzzle [JavaScript] 3 glasses puzzle , second, more general tool [JavaScript] 3 Glasses Problem in Barycentric Coordinates Three Jugs Problem [Java] Two Pails Puzzle [Java] 4x4 coloring problem Abacus in Various Number Systems [Java] About numbers Addition Addition and Subtraction of Functions [Java] Affirmative Action Problem [Java] The Aliquot Game [Java] Almost every integer has the digit 3 in it Almost Integers - Gaussian Integers An Application of Mental Arithmetic to Highway Safety An Interesting Number Arithmetic-Geometric Means Inequality Arithmetic magic matrix [Java] Arithmetic Operations in Various Bases [Java] Arithmetic Paradoxes A simple integral Averages, Arithmetic and Harmonic Means

85. Mathproblems.info Over one hundred and fifty math problems ranging from basic math to differential equations. http://mathproblems.info/

Mathproblems.info Formerly known as Shack's Math Problems By Michael Shackleford, A.S.A. Last update: December 14, 2001 Welcome to my page of math problems. Anyone with an appreciation of a good math problem should find something they like here, with problems ranging from basic math to differential equations. Each problem also comes with a difficulty rating from one to four stars. This is roughly a measure of how much time it took me to do the problem. Since your math background is likely different from mine your experience is likely to vary. The Math Problems Problems Problems Problems Problems Problems Problems Problems Problems Problems Problems Looking for a specific problem? Try the index One million digit of pi One million digit of e Other Web Pages of Mine Tired of math? Try my new world geography quiz Acknowledgements . A list of people who have sent in problems and solutions as well as other math pages I recommend. Name Distributions in the Social Security Area MathProblems.info home

86. MathPuzzle.com math Games, math puzzles, and mathematical Recreations. For an update on the general problem, see Polyomino Oddities at Sicherman s site. http://www.mathpuzzle.com/

Puzzler's Picks Mathematica MathWorld Mathematical Explorer Mathforge.net Math Games Math Games Sudoku Variations Vector vs. Raster Tournament Dice Deadly Rooms of Death ... Paterson's Worms Revisited Archived Pages Mar-Jun Mar/April, design 2 Mar/April, design 1 Jan/Feb ... June-Dec More mathpuzzle pages Awards Book Recommendations Chaos Tiles Characteristic Polynomial ... Zome Google Search www mathpuzzle Support mathpuzzle.com Material added 11 Sep 05 Sudoku Variations The Magic Sudoku puzzle by Alexandre Owen Muniz a few weeks back was very popular . I followed it up with a Math Games column about Sudoku Variations . An unsung hero in this is Wei-Hwa Huang, who sent me an enormously helpful list of Sudoku types . Alan O'Donnell sent solutions (and corrections) for every puzzle in the column "I think I can say I've truly conquered this genre of puzzle now." Bob Harris mentioned that the Geometric Sudoku are also known as Latin Squares , with only one given per region. Bob Harris: It's amazing to me how much more difficult generating an 8x8 puzzle seems to be than a . Here's an 8x8 (below). Probably pretty hard, but at least 3 cells can be labeled quickly and a couple other matches (this cell is the same as this other cell) can also be identified.

87. Links Weekly puzzles Macalester College Problem of the Week,SMSU Problem Corner,Paint by A wide assortment of interactive math puzzles and utilities. 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)

88. AIMS Puzzle Corner Custom math and Science Custom ProblemSolving One-Day math The AIMS Puzzle Corner provides teachers with a variety of interesting puzzles that can http://www.aimsedu.org/Puzzle/

Activities Overview AIMS Activities DB AIMS Magazine Books ... Help/Info AIMS Puzzle Corner The AIMS Puzzle Corner provides teachers with a variety of interesting puzzles that can be used to create a learning environment where students engage in doing mathematics just for the fun of it! With the proper encouragement and enthusiasm on the part of the teacher, students can learn to enjoy puzzles and the mathematics behind them. Note: Due to upcoming changes to our AIMS Magazine we are reevalutating how many puzzles we will be able to release this year. Solutions appear the month following the puzzle's introduction. Home Activities Workshops Science Core Curriculum ... Free Resources

89. Puzzles And Problems http://members.cox.net/mathmistakes/puzzles.htm

90. The Ultimate Puzzle Site: Mathematical Problems http://www.puzzle.dse.nl/math/

91. Math.com Puzzles, Games, And Contests Exercise Your Brain and Have Fun! puzzles and Games; Problem of the Week; Speed math, math Magic, Mental math; Simulations; Contests http://www.math.com/students/puzzles.html

Home Teacher Parents Glossary ... Email this page to a friend More Games Peg Solitaire Fiver Hare and Hounds Tower of Hanoi ... Maze Generator Resources Cool Tools References Test Preparation Study Tips ... Wonders of Math Search Exercise Your Brain and Have Fun! Puzzles and Games Problem of the Week Speed Math, Math Magic, Mental Math Simulations ... Contests Puzzles and Games Math.com Online Puzzles - A collection of interactive online puzzles based on historic games. Online Rubik's Cube - Guaranteed to keep you online past bedtime! (Advanced Topic - Notes on the Math of Rubik's Cube Cut-the-Knot Interactive mathematics miscellany and puzzles. (Alex Bogomolny) K-12 Problems and Puzzle Sites - Web sites with problems, challenges, and puzzles sorted by grade level and topic. (Math Forum) The Amazing Mathematical Object Factory - Magic squares and more, with information and history. (Canada's SchoolNet) Famous Puzzles - Exercise your brain with problems that have kept people guessing for centuries! (Math Forum)

92. Jim Loy's Puzzle Page The Travelling Salesman Problem in my Computer pages; Dominoes On a Checker Stereograms David Coles Triangle Puzzle math Maze. My original puzzles http://www.jimloy.com/puzz/puzz.htm

Go to my home page Jim Loy's Puzzle Page Also see my Mathematics pages. My puzzle pages have been chosen, by Learning in Motion , as one of the top ten educational sites on the WWW (for October 2000). I received this email: I discovered your site looking for info on Figure Logic puzzles. It's very nice! I am a pretty capable puzzle solver. It is because of you, I think, that I have become such a fan of Word Arithmetic. I am now more willing to make a table and guess things. Thank you for existing! Number Puzzles: Classic puzzles: NEW Archimedes' Cattle Problem NEW Number Magic Four Fours Eight Loaves of Bread The Fly and the Bicycles ... Chinese Rings NEW The Missing Dollar Nim in my Mathematics pages A Clock Puzzle The High Low Game More recent puzzles: A Couple of Mensa Puzzles The Case of the Missing Divisor Sally's Age Eve Did Talk ... Sum of n Consecutive Integers in my Mathematics pages Not Much of a Puzzle Word Arithmetics: Solving Word Arithmetics (the basics) Advanced Word Arithmetics Word Arithmetics - part 3 Word Arithmetics - part 4 Word Arithmetics - Advice By eMail ... Word Arithmetics - Part 8 (a tough one) Word Arithmetics - Impossible?

93. The Contest Center - Puzzles & Riddles A listing of the riddle, brainteaser and verbal puzzle pages on the Contest Center website. Riddle, puzzle, brainteaser and math problem webpages http://www.contestcen.com/index03.htm

Riddle, puzzle, brainteaser and math problem webpages W I N I O N O W The Contest Center 59 DeGarmo Hills Road Wappingers Falls, NY 12590 W I N I O N O W Like this site? Please tell a friend Please sign our Guestbook Links to puzzles and riddles RIDDLES FOR KIDS Funny riddles for younger children QUICK LOOKS Easy riddles you can solve on sight CLASSIC RIDDLES Elementary riddles requiring mainly logic Medium riddles and brainteasers TOUGH STUFF Tougher puzzles EASY MATH PUZZLES Easy puzzles requiring only high school math HARDER MATH PUZZLES Harder puzzles requiring high school math EXPERT MATH PUZZLES Puzzles requiring greater mathematical skill and knowledge GEOMETRY Geometry problems, and boxes with blockses. DIGITS Problems involving the digits of a number (easy to expert) SQUARES and POWERS Problems involving squares, cubes and higher powers PRIMES and FACTORS Problems involving prime numbers and prime factors Problems involving weighing, measuring and comparing stuff (easy to tough) MATHEMATICAL SERIES Problems in convergence/divergence of series PI COMPETITION Send us an email to request a sample issue of the Contest Center News, with the chance to win

94. Halfway Down The Danube: You Want Math Puzzles? fpi_coffecup.jpg Here s a math puzzle. Taken from the 46th International Problem 4 is also very cute, and has some of the puzzlesolving aspect you re http://www.bookcase.com/~claudia/mt/archives/000722.html

Halfway down the Danube Main July 20, 2005 You want math puzzles? Here's a math puzzle. Taken from the 46th International Mathematical Olympiad , held in rainy Merida, Mexico: In a mathematical competition 6 problems were posed to the contestants. Each pair of problems was solved by more than two-fifths of the contestants. Nobody solved all 6 problems. Show that there were at least 2 contestants who each solved exactly 5 problems. Give yourself four hours and thirty minutes. Incidentally, Romania won four gold medals, a silver, and a bronze at the Olympiad out of her six contestants. They're all high school students. Posted by coyu at July 20, 2005 02:51 PM Comments A nice problem! I got it in a minute or two without pencil and paper, but that's because I teach undergrad discrete math. I think this would be a good homework problem for my students, but maybe too tricky for an exam. A hint: Remember the Lake Wobegon Principle, which says that it is not possible for every number in a set to be above average (strictly greater than the arithmetic mean).

95. Mathematics Puzzles And Problems puzzles AND problems. Home Page Logic Test Cats Rats Introduction to Puzzle Page . Many of our successes in any fields of endeavor are due to our http://www.kc.cc.il.us/ArtsAndSciences/mathematics/myproj.htm

<% Set MyPageCounter = Server.CreateObject("MSWC.PageCounter") MyPageCounter.PageHit %> PUZZLES AND PROBLEMS Home Page Logic Test Pails Who's the Engineer ... Who Drinks Water? "Introduction to Puzzle Page" Many of our successes in any fields of endeavor are due to our ability to think logically. Many of our failures likewise are due to our lack of ability to think logically. The list on the left are some exercises to test and challenge your mind. Just click on the desired Link on the left to see the problem. Solve the problem and click on the answer button to see the solution. The first activity is a simple logic test. Answer the questions on a piece of paper and then click on the answer button to see the answers. The scale on the bottom of the test gives you an idea how well you did. Good luck!! If you exercise your mind you have done well!! If you have problem's to contribute please email the problem to us. The address is jsjohnson@kc.cc.il.us

96. Puzzles Many puzzles to choose from crosswords, anagrams, doublets, trivia, math and word searches. http://thinks.com/puzzles/

Home Puzzle Parade The Internet's most entertaining puzzles are here: Crosswords and crossword variants, anagrams, doublets, trivia, riddles, chess problems, math puzzles, logic puzzles, word search puzzles, jigsaw puzzles ... and more! Happy puzzling! Wotsit? What is the word or phrase? Crosswords etc. The Daily Crossword A new standard US-style crossword puzzle every day Araucaria Crossword Gallery Tough puzzles by the doyen of British crossword constructors. Daily Codebreaker Crossword Crack the codes to solve the crosswords! A new puzzle every day! Cryptic Crosswords Entertaining and challenging puzzles by a master Anagram Crosswords All the clues are anagrams The World's First Crossword Discover a piece of puzzle history Crossfigure Puzzles Not crosswords but crossnumbers Hidden Countries Find the names concealed in the text. Forty Traditional Riddles Old-fashioned riddles spanning several centuries. The Tree Riddle It'll drive you nuts! Doublets Word transformation puzzles Anagram Puzzles Intriguing letter legerdemain Word Search Wizardry Super word search puzzles to solve online or print.

97. IBM Research | Ponder This Monthly logic and math puzzles set by IBM researchers with solutions. http://www.research.ibm.com/ponder/

Country/region change All of IBM Home Products My account IBM Home ... Ponder This Ponder This Welcome to our Monthly Puzzles You are cordially invited to match wits with some of the best minds in IBM Research. Seems some of us can't see a problem without wanting to take a crack at solving it. Does that sound like you? Good. Forge ahead and ponder this month's problem. We'll post a new one every month, and allow two to three weeks for you to submit solutions (we may even publish submitted answers, especially if they're correct). Towards the end of the month, we'll post the answer. Here is the solution for our August 2005 problem. And now... here's our September challenge! So give your mind a break from its routine-you never know what other problems you may solve in the process! - Don Coppersmith If you have any problems you think we might enjoy, please send them in. All replies should be sent to: webmaster@watson.ibm.com Archive September 2005 Challenge Solution August 2005 Challenge Solution July 2005 Challenge Solution June 2005 Challenge Solution May 2005 Challenge Solution April 2005 Challenge Solution March 2005 Challenge Solution February 2005 Challenge Solution January 2005 Challenge Solution December 2004 Challenge Solution November 2004 Challenge Solution October 2004 Challenge Solution September 2004 Challenge Solution Challenge Solution July 2004 Challenge Solution June 2004 Challenge Solution May 2004 Challenge Solution April 2004 Challenge Solution March 2004 Challenge Solution February 2004

98. Mixed-Up Math - An Educational Math Logic Puzzle. math puzzle MixedUp math - A free educational math game and logic puzzle math games mixed rate math problems puzzle teacher math puzzle logic math http://www.kprobe.com/kprobe/mu.htm

Games Banner Network Mixed-Up Math - A free educational math game and logic puzzle for all ages. Our other software... Math Cards Math card game Quote Works Solve jumbled quotations Word Rotation Word puzzle The Math Worm Mathematical maze Rebuild the correct mathematical equation(s) in this challenging math puzzle Over 30 formula formats including boxes, crosses, mazes, ladders. Try Mixed-Up Math now > Click HERE for a live demo. Playing the game. Drag incorrectly placed numbers into their correct positions. Place all the numbers to complete the round. Diagonal puzzle shown Before and after Simple puzzle shown DOWNLOADS 1. Request Mixed-Up Math Trial Version HERE 2. Download Free On-Line Educational Games ToolBar for your Browser HERE Teachers : make your own subject-specific phrase puzzles HERE 4. Check out MathCards HERE Reviews Review by Dywebcon Here's an exceptional freeware educational math game and logic puzzle! Don't be fooled by the word "educational", it's loads of fun and has over 20 formula formats to keep you playing for a long time. ... suitable for use by teachers at all grade levels in classrooms and home schooling. Read review by CFS: Review by Tudogs.com:

99. Math Cards - A Mathematical Facts Card Game - With Voice Feedback. Word puzzle, math logic puzzle The math Worm mathematical maze scrambled, education, educational, puzzle, challenge, intelligent , solve math problems, http://www.kprobe.com/kprobe/mc.htm

Games Banner Network Math Cards - A challenging math facts game with voice feedback. Our other software... Mixed-Up Math math logic game French Connections French word game Stack Mates Word puzzle The Math Worm Mathematical maze Math Cards helps students reinforce their math skills by building math equations and verifying facts. Play against a talking computer in this mathematical facts game. MathCards mixes the playing cards concept with voice technology By earning credits, kids can play one of four relaxing games as their reward. Playing the game. Math Cards has over a dozen modes of play. Students can practice their facts in the Practice mode. They can form facts in the Fact Factory Use strategy in Facts, Cross-Facts and Triple-Cross-Facts In Sequence , pupils arrange fractions, percents and decimals into ascending order. During Challenge mode, the computer quizzes your knowledge of math. Challenges include Pair-Up In-Between Dare to Compare Hi-Lo and more. Fast-paced War is played with Roman numerals and other equivalent numbers. Match Cards offers the ability to use equivalent cards, eg: 0.75 equals 75%, Roman XIV equals 14.

100. Manufacturing Is Cool - Tests/Games Menu A math puzzle of the week. Southwest Missouri State University s Problem Corner Look here for math and critical thinking puzzles. 21st Century Problem http://www.manufacturingiscool.com/tests.htm

Students: Test Your "Know Zone" NEAS+ (National Engineering Aptitude Search) An academic self assessment. Check out these cool web sites for quizzes to test your "Know Zone". Taking America's Measure A fun way to learn about measurements, science and technology for fourth to eighth grade students. Edutest.com Math and language arts tests for grades 2-8. The Internet Public Library Youth Division Really neat math games and science experiments. Check out "So You Want to Make a Car" to play a create-your-own-company game! Yahooligans Directory Elementary, middle, and high school math, games, and puzzles. QuizStar Quizzes in many subjects from middle school up into college. iWebShed.Com - Center of the Web Challenging science and technology math games. Kids Math Math quizzes for ages 3-12. Music, English Reading, and SAT quizzes are coming soon. FunBrain.com Numerous kinds of games grouped by age and category. Math Strategies Math Strategies was chosen by teachers to reinforce key concepts. A demo version is available on this website. All Mixed Up A collection of on-line games for kids of all ages.

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