Maths Challenge
Maths challenge.net: Problem Solving Database
Need some challenging problem-solving work for your students in the following areas: Discrete, Geometry, Numbers, and Code Breaking? This is the place for an enormous database of problems aimed at high school age students. They are...
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Brain Food: Puzzles for the Brain to Gnaw On
This site includes many games and puzzles ranging from word games to logic problems to riddles. These puzzles can be completed on line and offer interactive hints and solutions.
Cut the Knot
Cut the Knot: Eight Digits Puzzle
Challenge yourself to this tricky little puzzle in which the player must position 8 digits in a pattern without having any paths connecting successive digits.
Math Is Fun
Math Is Fun: Math and Logic Puzzles
A collection of puzzles that will challenge your knowledge of measurement, logic, symmetry, numbers, algebra, and other math-related topics.
ABCya
Ab Cya: Math Puzzle: Sudoku
Plug in numbers to complete the equations and solve Sudoku puzzles.
Discovery Education
Discovery Education: Puzzlemaker
At this site create your own puzzles, build your own maze and print them out for yourself or others to enjoy.
National Institute of Educational Technologies and Teacher Training (Spain)
Ministerio De Educacion: Geo Gebra Prim (Conexiones Misteriosas)
Challenge yourself with this puzzle. Try to connect the dots of the same color with horizontal and vertical segments without leaving the grid and without crossing the lines.
Ministry of Education and Employment of Spain
Red Escolar: Problemas De Holmes 2002
In Spanish. Practice your mental math skills with this site. You will find different activities for every month of the year. Different levels of difficulty and suggested time limit for each activity are also provided.
National Council of Teachers of Mathematics
The Math Forum: Increasing Wall Area
This site presents a problem at a museum that has one large square gallery. The director wants to divide this room down the middle into four smaller square rooms.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (001 005)
Challenge yourself with these five math problems. Each problem is marked by their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (011 015)
Challenge yourself with these five math problems. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (016 020)
Challenge yourself with these five math problems. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (006 010)
Challenge yourself with these five math problems. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (021 025)
Challenge yourself with these five math problems. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (026 030)
These math problems can help to prepare you for future math competitions. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (031 035)
These math problems can help to prepare you for future math competitions. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (036 040)
These math problems can help to prepare you for future math competitions. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (041 045)
These math problems can help to prepare you for future math competitions. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (046 050)
These math problems can help to prepare you for future math competitions. Each problem is marked according to their levels of difficulty.
Mensa Espana
Juegos De Ingenio Del Club Mensa (051 055)
Solve these math problems to practice for future math competitions. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (056 060)
Solve these math problems to practice for future math competitions. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (061 065)
Solve these math problems to practice for future math competitions. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (066 070)
Get ready for future math competitions with these five math problems. Each problem is marked according to their levels of difficulty.
Mensa Espana
Mensa: Juegos De Ingenio Del Club Mensa (071 075)
Get ready for future math competitions with these five math problems. Each problem is marked according to their levels of difficulty.