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

The computer starts with all the lights off, but then clicks 3, 4 or 5 times at random, leaving some lights on. Can you switch them off again?

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

A game for 2 people. Take turns joining two dots, until your opponent is unable to move.

Here is a version of the game 'Happy Families' for you to make and play.

Can you work out how to win this game of Nim? Does it matter if you go first or second?

Nim-7 game for an adult and child. Who will be the one to take the last counter?

A Sudoku with clues given as sums of entries.

A game for 2 players. Can be played online. One player has 1 red counter, the other has 4 blue. The red counter needs to reach the other side, and the blue needs to trap the red.

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.

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.

A game for 1 person. Can you work out how the dice must be rolled from the start position to the finish? Play on line.

You'll need two dice to play this game against a partner. Will Incey Wincey make it to the top of the drain pipe or the bottom of the drain pipe first?

Here are a collection of games from around the world to try during the holidays or the last few weeks of term.

Try this version of Snap with a friend - do you know the order of the days of the week?

A game for 2 players. This could be played outside with people instead of counters. Try to trap or escape from your opponent.

A game somewhat similar to 'noughts and crosses' on a much larger space.

A game for 2 players. Draw a daisy with at least 5 petals. Shade 1 or 2 petals next to each other. The winner shades the last petal.

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.

A game that tests your understanding of remainders.

The game uses a 3x3 square board. 2 players take turns to play, either placing a red on an empty square, or changing a red to orange, or orange to green. The player who forms 3 of 1 colour in a line. . . .

A game for 1 or 2 people. Use the interactive version, or play with friends. Try to round up as many counters as possible.

A game for 2 players. Take turns to place a counter so that it occupies one of the lowest possible positions in the grid. The first player to complete a line of 4 wins.

This is a game for 2 players. Each player has 4 counters each, and wins by blocking their opponent's counters. A good follow-on from two stones.

An ordinary set of dominoes can be laid out as a 7 by 4 magic rectangle in which all the spots in all the columns add to 24, while those in the rows add to 42. Try it! Now try the magic square...

Can you make the birds from the egg tangram?

A game for 1 person to develop stategy and shape and space awareness. 12 counters are placed on a board. Counters are removed one at a time. The aim is to be left with only 1 counter.

This is a challenging game of strategy for two players with many interesting variations.

Try this matching game which will help you recognise different ways of saying the same time interval.

The aim of the game is to slide the green square from the top right hand corner to the bottom left hand corner in the least number of moves.

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

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.

Square It game for an adult and child. Can you come up with a way of always winning this game?

A game for 2 players. Using 2 dice, some counters and a games board, can you form a line of counters from one side of the board to the other?

Incey Wincey Spider game for an adult and child. Will Incey get to the top of the drainpipe?

Everthing you have always wanted to do with dominoes! Some of these games are good for practising your mental calculation skills, and some are good for your reasoning skills.

A game for two players. You'll need some counters and somewhere to draw a board.

Hover your mouse over the counters to see which ones will be removed. Click to remover them. The winner is the last one to remove a counter. How you can make sure you win?

In this game for two players, you throw two dice and find the product. How many shapes can you draw on the grid which have that area or perimeter?

Can you use the numbers on the dice to reach your end of the number line before your partner beats you?