A Cleverly-Titled Logic Puzzle Blog

A large and varied collection of puzzles by logicsmith Grant Fikes.

http://mathgrant.blogspot.co.uk/

A+ Math

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

http://www.aplusmath.com/

Aha! Puzzles

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

http://www.ahapuzzles.com/

Algebraic Math Puzzles

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

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

Alien Tiles

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

http://www.alientiles.com/

Alphametic Puzzles

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

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

Alphametics Page

Compiled by Mike Keith. Examples of various genres.

http://www.cadaeic.net/alphas.htm

Alphametics and Cryptarithms

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

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

Brain Teasers and Maths Puzzles

Interactive logical and mathematical puzzles with feedback and detailed solutions.

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

Brain Teasers by QBrute

Original brain teasers with solutions.

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

Colorful Mathematics

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.

http://people.ucalgary.ca/~laflamme/colorful/colorful.html

Contest Center Cryptarithms

Examples of cryptarithms, with prize competitions for subscribers.

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

Creative puzzles

Interactive puzzle archive with descriptions for puzzle construction and a special children's puzzle page.

http://www.creatievepuzzels.com/

Dick's Math Puzzle Page

A collection of mathematical puzzles, some original, with fully worked solutions.

http://www.mod2.org/

Downloadable and online games

A variety of Flash- and Java-based games and puzzles.

http://www.gameintellect.com/

Free Puzzle Collections

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

http://www.freepuzzles.com/

Group Games

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

http://www.dmi.units.it/~logar/duek2/index_engl.html

Hot Pepper Math Puzzles

Fun, interactive brain teasers you can play anywhere.

http://www.hotpepperpuzzles.com/

IQ Flash: Online games, puzzles

New printable puzzles, math games, board games, and logic games in flash.

http://www.iqflash.com/

Interactive Mathematics Miscellany and Puzzles

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

http://www.cut-the-knot.org/

Math Puzzles

Logic puzzles and riddles with some solutions.

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

Mathematical Recreations

Detailed exploration of a selection of mathematical topics.

http://www.mathrec.org/

Mathpuzzle.com

Celebrates math puzzles and mathematical recreations.

http://mathpuzzle.com/

Mathschallenge.net

A website dedicated to the puzzling world of mathematics, with a discussion forum.

http://mathschallenge.net/

Mathschallenge.net

A website dedicated to the puzzling world of mathematics.

http://mathschallenge.net/rss2.xml

Mathwizz

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

http://www.mathwizz.com/

Missouri State University's Problem Corner

Math problems in three levels of difficulty: high school, advanced, and challenge. With archives.

http://people.missouristate.edu/lesreid/potw.html

Mixed Up Math

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

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

Mr Titen's More Than Math

Mathematics teacher provides puzzles and games for students.

http://www.oocities.org/hbwmathman/

Nick's Mathematical Puzzles

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

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

Nick's Mathematical Puzzles

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

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

Paul Hsieh's Puzzles

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

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

Polyhedra Links

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

http://britton.disted.camosun.bc.ca/jbpolyhedra.htm

Project Eureka

A collaborative environment for math problem solvers and submitters. Wide range of math and programming problems, interview tests, and trivia questions.

http://projecteureka.org/

Puzzle of the Week Archives

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

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

Pythabacus

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

http://www.pythabacus.com/

Sequence Puzzles and Problems

Find the next entry in each sequence. With links to related sites. Compiled by Torsten Sillke.

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

Storkey: Two Envelope Paradox

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

http://homepages.inf.ed.ac.uk/amos/doubleswap.html

The Contest Center

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

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

The Little Math Puzzle

The Little Math Puzzle has been a K-12 Internet activity since 1995 for grades 5-9. Currently the puzzles have ceased but the site maintains complete archives of past problems.

http://www.sprucelog.com/lmp/

The Puzzling World of Barry R. Clarke

Brain teasers, articles and puzzles forum.

http://barryispuzzled.com/

Torus and Klein Bottle Games

Collection of Java-based educational puzzles.

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