Home | Science | Math | Recreations

Problem of the Week

AIMS Puzzle Corner, Alvirne High School Problem of the Week, Baylor Problem of the Month, Bradley University Problem of the Week, Calculus-Help Problem of the Week, Dansmath Problem of the Week, Hamline University, IBM Research Ponder This, John Handley High School Problem of the Week, Ken Duisenberg's Puzzle of the Week

15 Puzzle of Sam Lloyd

http://www.holotronix.com/samlloyd15.php

Play online Sam Lloyd's "15" puzzle The funny story of this game Mathematical implications of this game Some funny logical problems with the 15 game.

A Primer on Cryptarithmetic

http://www.geocities.com/Athens/Agora/2160/primer.html

Instructions, examples, references and links.

A+ Math

http://www.aplusmath.com/

Interactive math help for K-12 students with flashcards, Math Wordfind, Homework Helper and worksheets.

Aha! Puzzles

http://www.ahapuzzles.com

Puzzles, books, games and tests with designed by Lloyd King, author of "Test Your Creative Thinking".

Algebraic Math Puzzles

http://www.lifesmith.com/mathpuz1.html

A collection of puzzles at high school level. Does not include answers.

Alien Tiles

http://www.alientiles.com/

Object of puzzle is to try to get color pieces to create certain patterns in cube.

Alphametic Puzzles

http://www.tkcs-collins.com/truman/alphamet/

Numerous puzzles, links, puzzle solver, and a generator.

Alphametics and Cryptarithms

http://www.mathematik.uni-bielefeld.de/~sillke/PUZZLES/ALPHAMETIC/

Puzzles in which letters or symbols are substituted for the digits in an arithmetical operation like addition.

Alphametics Page

http://members.aol.com/s6sj7gt/mikealp.htm

Compiled by Mike Keith. Examples of various genres.

Archive Creative puzzles

http://www.creativepuzzels.nl

Interactive puzzle archive with descriptions for puzzle construction and a special childrens puzzle page.

BCIT Mathematical Entertainment

http://www.math.bcit.ca/entertainment/

Famous mathematical problems, puzzles, facts, games and trivia.

Brain Teasers and Maths Puzzles

http://www.syvum.com/teasers/

Interactive logical and mathematical puzzles with feedback and detailed solutions.

Brain Teasers by QBrute

http://www.angelfire.com/empire/qbrute/

Original brain teasers with solutions.

Clever Games for Clever People

http://www.cs.uidaho.edu/%7Ecasey931/conway/games.html

Games that interest John Conway including Rim and Traffic Jam.

Colorful Mathematics

http://www.math.ucalgary.ca/~laf/colorful/colorful.html

Educational software presents advanced mathematics to K-12 students in a game-oriented approach, using coloring and drawing techniques to illustrate concepts from graph theory and computer science.

Contest Center Cryptarithms

http://www.contestcen.com/rithms.htm

Examples of cryptarithms, with prize competitions for subscribers.

Curious Numbers

http://www.geocities.com/mrsjennifercall/jennifer_math.htm

A tribute to the lighter side of math including puzzles, humor, trivia, quotes, inspirations, and math links.

Free Puzzle Collections

http://www.freepuzzles.com/

Educational and recreational puzzles for teachers, students and parents. Each puzzle is graded by difficulty and has a hint. Solutions are available to members.

Group Games

http://www.dsm.univ.trieste.it/%7Elogar/duek2/index_engl.html

Animations that develop the theory behind such puzzles as the Rubik cube.

Interactive Mathematics Miscellany and Puzzles

http://www.cut-the-knot.com/content.html

Java-based math resource including articles, puzzles and links.

iQED!

http://homepage.ntlworld.com/atalanta

Lateral puzzles from "Puzzles for the High IQ" author Lloyd King and founder of The Puzzle Wizards SiteRing.

Ken Duisenberg's Puzzle of the Week Archives

http://www.ecst.csuchico.edu/%7Ekend/potw/archlist.html

Challenging puzzles and problems.

Logic Puzzles

http://www.geocities.com/bob_kraus_2000

Collection of original numerical-logic puzzles. Many are long and difficult, involve sorting and comparing long lists and are intended to be solved using a good spreadsheet program.

Logicville

http://www.logicville.com/

Educational puzzles, brain teasers, and word games such as anagrams, cryptograms, alphametics, doublets, tangrams.

Magic Math Kingdom

http://www.nes-lab.com/english2/

Learn math through games and quiz-oriented tutorial.

Math Forum

http://mathforum.org/

Resources, problems and forum for teachers and students in mathematics.

Math Puzzles

http://www.math.utah.edu/~cherk/puzzles.html

Logic puzzles and riddles with some solutions.

MatheMagic

http://geocities.com/mathimoh

A collection of mathematical puzzles, jokes and articles.

MatheMajik

http://mathemajik.tripod.com/

Indian site featuring calculation tricks and math puzzles.

Mathematical Recreations

http://www.mathrec.org/

Detailed exploration of a selection of mathematical topics.

Mathproblems.info

http://mathproblems.info/

Over one hundred and fifty math problems ranging from basic math to differential equations.

Mathpuzzle.com

http://www.mathpuzzle.com/

Celebrates math puzzles and mathematical recreations.

Mathschallenge.net

http://mathschallenge.net/

A website dedicated to the puzzling world of mathematics and computer programming.

Mathwizz

http://www.mathwizz.com/

Interactive math problems for abilities ranging from middle school to university.

Mixed Up Math

http://www.kprobe.com/kprobe/mu.htm

Logic problems, where equations are mixed up. In various formats like boxes, crosses, diagonals, mazes. Free download.

Mr Titen's More Than Math

http://www.geocities.com/EnchantedForest/Tower/1133/

Mathematics teacher provides puzzles for students.

Nick's Mathematical Puzzles

http://www.qbyte.org/puzzles/

A collection of puzzles, with hints, solutions, and links to related mathematical topics.

Nick's Mathematical Puzzles

http://www.qbyte.org/puzzles/rss2.xml

A collection of puzzles, with hints, solutions, and links to related mathematical topics.

Paul Hsieh's Puzzles

http://www.azillionmonkeys.com/qed/puzzles.html

Logical and mathematical brain teasers, with an indication of difficulty. Hints are provided; solutions are available by email.

Perfect Times

http://www.perfect-times.co.uk/

Teaches and assesses fluency of multiplication and division tables using online cards. Submit data and compare results.

Polyhedra Links

http://www.camosun.bc.ca/~jbritton/jbpolyhedra.htm

Pastime and activity links for various geometric patterns, polygons and polyhedra by Jill Britton.

Polymorf - Symmetry of Polyhedra

http://www.polymorf.net/

A demonstration of the symmetry and transformational properties of the Platonic and Archimedean solids.

Puzzle of the Week Archives

http://ecg.mit.edu/george/puzzles/

A collection of puzzles, with hints and full solutions. Compiled by George Moody.

Pythabacus

http://www.pythabacus.com/

Description and instruction of using the ancient Pythagorean Abacus to do arithmetic.

Riddles

http://www.julienstern.org/riddle.php3

A collection of riddles and logic puzzles with solutions.

Scott Kim

http://www.scottkim.com/

Puzzles for web, computers, and print; ambigrams.

Sequence Puzzles and Problems

http://www.mathematik.uni-bielefeld.de/~sillke/SEQUENCES/

With links to related sites. Compiled by Torsten Sillke.

SMSU Problem Corner

http://math.smsu.edu/%7Eles/POTW.html

Math challenges Southwest Missouri State University in three levels of difficulties.

Storkey: Two Envelope Paradox

http://www.anc.ed.ac.uk/~amos/doubleswap.html

A tough but simply defined problem which demonstrates key issues in probability.

The Contest Center

http://www.contestcen.com/classic.htm

Classic puzzles and riddles requiring only simple logic and elementary math.

The Enigmatic World of Philip Carter

http://www.knowl.demon.co.uk/

Collection of brain teasers from the author of IQ books.

The Null Set

http://www.princeton.edu/~mathclub/puzzles.html

Puzzles collected by Guy Kindler, most requiring some undergraduate mathematical knowledge. Some hints are provided.

The Puzzling World of Barry R. Clarke

http://barryispuzzled.com/

Brain teasers, articles and puzzles forum.

Tile Tris

http://members.lycos.co.uk/tiletris/

Tile a spheroid working room aperiodically or periodically. Includes free demo download.

Torus and Klein Bottle Games

http://www.geometrygames.org/TorusGames/index.html

Collection of Java-based educational puzzles.

Wu's Riddles

http://www.ocf.berkeley.edu/~wwu/riddles/intro.shtml

A collection of riddles, puzzles, and technical interview questions, with a discussion forum.