Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?

A game that tests your understanding of remainders.

This sudoku requires you to have "double vision" - two Sudoku's for the price of one

Two sudokus in one. Challenge yourself to make the necessary connections.

Given the products of diagonally opposite cells - can you complete this Sudoku?

Two sudokus in one. Challenge yourself to make the necessary connections.

This second Sudoku article discusses "Corresponding Sudokus" which are pairs of Sudokus with terms that can be matched using a substitution rule.

A Sudoku that uses transformations as supporting clues.

Solve this Sudoku puzzle whose clues are in the form of sums of the numbers which should appear in diagonal opposite cells.

This pair of linked Sudokus matches letters with numbers and hides a seasonal greeting. Can you find it?

A game in which players take it in turns to try to draw quadrilaterals (or triangles) with particular properties. Is it possible to fill the game grid?

A game in which players take it in turns to turn up two cards. If they can draw a triangle which satisfies both properties they win the pair of cards. And a few challenging questions to follow...

Four numbers on an intersection that need to be placed in the surrounding cells. That is all you need to know to solve this sudoku.

A Sudoku based on clues that give the differences between adjacent cells.

A game in which players take it in turns to choose a number. Can you block your opponent?

Practise your diamond mining skills and your x,y coordination in this homage to Pacman.

A game for 2 or more people, based on the traditional card game Rummy. Players aim to make two `tricks', where each trick has to consist of a picture of a shape, a name that describes that shape, and. . . .

Can you spot the similarities between this game and other games you know? The aim is to choose 3 numbers that total 15.

Take turns to place a decimal number on the spiral. Can you get three consecutive numbers?

This article for teachers describes several games, found on the site, all of which have a related structure that can be used to develop the skills of strategic planning.

Spiralling Decimals game for an adult and child. Can you get three decimals next to each other on the spiral before your partner?

The game of go has a simple mechanism. This discussion of the principle of two eyes in go has shown that the game does not depend on equally clear-cut concepts.

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.

This article explains the use of the idea of connectedness in networks, in two different ways, to bring into focus the basics of the game of Go, namely capture and territory.

A simple game of patience which often comes out. Can you explain why?

Why not challenge a friend to play this transformation game?

A game for 1 person to play on screen. Practise your number bonds whilst improving your memory

A Sudoku with clues given as sums of entries.

A game for 2 players. Given an arrangement of matchsticks, players take it is turns to remove a matchstick, along with all of the matchsticks that touch it.

A game for 2 players that can be played online. Players take it in turns to select a word from the 9 words given. The aim is to select all the occurrences of the same letter.

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

A game for 2 people. Take turns placing a counter on the star. You win when you have completed a line of 3 in your colour.

There are nasty versions of this dice game but we'll start with the nice ones...

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

A game for two people, who take turns to move the counters. The player to remove the last counter from the board wins.

Interactive game. Set your own level of challenge, practise your table skills and beat your previous best score.

Basic strategy games are particularly suitable as starting points for investigations. Players instinctively try to discover a winning strategy, and usually the best way to do this is to analyse. . . .

Advent Calendar 2010 - a mathematical game for every day during the run-up to Christmas.

Many natural systems appear to be in equilibrium until suddenly a critical point is reached, setting up a mudslide or an avalanche or an earthquake. In this project, students will use a simple. . . .

Unmultiply is a game of quick estimation. You need to find two numbers that multiply together to something close to the given target - fast! 10 levels with a high scores table.

Use the tangram pieces to make our pictures, or to design some of your own!