Here is a chance to play a version of the classic Countdown Game.

Can you explain the strategy for winning this game with any target?

Got It game for an adult and child. How can you play so that you know you will always win?

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.

Play this game and see if you can figure out the computer's chosen number.

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

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

Factors and Multiples game for an adult and child. How can you make sure you win this game?

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

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.

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.

Slide the pieces to move Khun Phaen past all the guards into the position on the right from which he can escape to freedom.

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...

This is a game for two players. You will need some small-square grid paper, a die and two felt-tip pens or highlighters. Players take turns to roll the die, then move that number of squares in. . . .

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

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

A game to make and play based on the number line.

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. . . .

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

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

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

Some Games That May Be Nice or Nasty for an adult and child. Use your knowledge of place value to beat your opponent.

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 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?

Why not challenge a friend to play this transformation game?

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

An activity based on the game 'Pelmanism'. Set your own level of challenge and beat your own previous best score.

Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?

This is an interactive net of a Rubik's cube. Twists of the 3D cube become mixes of the squares on the 2D net. Have a play and see how many scrambles you can undo!

Collect as many diamonds as you can by drawing three straight lines.

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

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. . . .

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

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

This game challenges you to locate hidden triangles in The White Box by firing rays and observing where the rays exit the Box.

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 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.

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

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 game for 2 players. Set out 16 counters in rows of 1,3,5 and 7. Players take turns to remove any number of counters from a row. The player left with the last counter looses.

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

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

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

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?