- A+ Math - Interactive math help for K-12 students with flashcards, Math Wordfind, Homework Helper and worksheets.
- Archive Creative puzzles - Interactive puzzle archive with descriptions for puzzle construction and a special childrens puzzle page.
- Brain Teasers and Maths Puzzles - Interactive puzzles to challenge logical and mathematical skills with intermediate feedback and detailed solutions.
- Brain teasers by QBrute - Original brain teasers from self-proclaimed puzzle genius.
- 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.
- Curious Numbers - A tribute to the lighter side of math including puzzles, humor, trivia, quotes, inspirations, and interesting math links.
- Interactive Mathematics Miscellany and Puzzles - Java-based math resource including articles, puzzles and links.
- iQED! - Lateral puzzles from "Puzzles for the High IQ" author Lloyd King and founder of The Puzzle Wizards SiteRing.
- Logic Puzzle - Quiz introducing the subject of logic to promote analytical thinking and memory skills. Uses Flash programming.
- Logicville - Educational puzzles, brain teasers, mathematical recreations and word games. A resource for anagrams, cryptograms, alphametics, word puzzles, logic problems, doublets, tangrams, chess, and math quizzes.
- Macalester College Problem of the Week - Weekly math problem and archive from Professor Stan Wagon for first-year college students presented by the Math Forum.
- Magic Math Kingdom - Designed for bringing joy to Math Study. Kids effectively learn math with friendly natural animals and/or worms, while a comprehensive game bring good stimulation.
- Math Forum - Resources, problems and forum for teachers and students in mathematics.
- MatheMagic - A collection of mathematical puzzles, jokes and articles.
- MatheMajik - Indian site featuring calculation tricks and math puzzles.
- Mathematical Recreations - Detailed exploration of a selection of mathematical topics.
- mathschallenge.net - A website dedicated to the puzzling world of mathematics. Also offers problems in computer programming and code breaking.
- Mathwizz - Interactive math problems for abilities ranging from middle school to university.
- Mixed Up Math - Logic problems, where equations are mixed up. In various formats like boxes, crosses, diagonals, mazes. Free download.
- Mr Titen's More Than Math - Mathematics teacher provides puzzles for students.
- Nick's Mathematical Puzzles - A collection of puzzles, with hints, solutions, and links to relevant mathematical topics.
- Nikora's Puzzles - A set of puzzles and riddles, ranging from basic math to college level, with full solutions.
- Paul Hsieh's Puzzles - Logical and mathematical brain teasers, with an indication of difficulty. Hints are provided; solutions are available by email.
- Perfect Times - Teaches and assesses fluency of multiplication and division tables using online cards. Submit data and compare results.
- Polyhedra Links - Pastime and activity links for various geometric patterns, polygons and polyhedra by Jill Britton.
- Polymorf - Symmetry of Polyhedra - A demonstration of the symmetry and transformational properties of the Platonic and Archimedean solids.
- Problem of the Week - Mathematical contest site for all ages offering a calculator prize for the winner of each of five weekly challenges. Exclusive prizes for below grade 6 and grades 6-12.
- Problems of the Week - Projects from the Math Forum presenting weekly interactive math challenges to accumulate points for bronze, silver and gold prizes. Individual or class participation.
- Purdue University Problem of the Week - Challenging puzzles, some requiring undergraduate mathematical knowledge. Full solutions are provided several weeks after each problem is set.
- Pythabacus - Description and instruction of using the ancient Pythagorean Abacus to do arithmetic.
- Quia! Mathematics Activities - Educational activities for teaching mathematics including concentration, matching, flash cards, word search puzzles, and quizzes. Includes Java games.
- Riddles - A collection of posers using logical reasoning or arithmetic skills to solve. Includes answers.
- Shack's Math Problems - Over one hundred math problems ranging from basic math to differential equations.
- Teaching Kids Math Playing Fun Educational Games - Online games for ages 0-14 with links to free resources.
- The Contest Center - Classic puzzles and riddles requiring only simple logic.
- The Enigmatic World of Philip Carter - A wonderland of brain teasers from prolific author of IQ books.
- The Null Set - Puzzles collected by Guy Kindler, most requiring some undergraduate mathematical knowledge. Some hints are provided.
- The Puzzling World of Barry R. Clarke - Brain teasers, articles and puzzles forum.
- Tile Tris - Tile a spheroid working room aperiodically or periodically. Includes free demo download.
- Torus and Klein Bottle Games - Collection of Java-based educational puzzles.
- Wu's Riddles - A collection of riddles, puzzles, and technical interview questions, with a discussion forum.
- Search our Wiki for Recreations Games Puzzles - Find more information about this subject by clicking here
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