Two Stones
This game is known as Pong hau k'i in China and Ou-moul-ko-no in Korea. Why not challenge a friend to play it with you?
Air Nets
Factors and Multiples Game
A game in which players take it in turns to choose a number. Can you block your opponent?
Dominoes
Pentanim
Low Go
Prime Magic
Colour in the Square
Domino Magic Rectangle
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...
Eight Dominoes
Two and Two
How many solutions can you find to this sum? Each of the different letters stands for a different number.
Square 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.
Take Ten Sticks
What's it worth?
There are lots of different methods to find out what the shapes are worth - how many can you find?
Product Sudoku
The clues for this Sudoku are the product of the numbers in adjacent squares.
Connect Three
crossing the bridge
Last Biscuit
Can you find a strategy that ensures you get to take the last biscuit in this game?
Marbles in a box
Take Three From Five
Caroline and James pick sets of five numbers. Charlie tries to find three that add together to make a multiple of three. Can they stop him?
One, Three, Five, Seven
Instant Insanity
Given the nets of 4 cubes with the faces coloured in 4 colours, build a tower so that on each vertical wall no colour is repeated, that is all 4 colours appear.
Times right
Nine Colours
Some Circuits in Graph or Network Theory
Warmsnug Double Glazing
Equal Equilateral Triangles
Iffy logic
Curvy areas
How old am I?
Pair Products
Choose four consecutive whole numbers. Multiply the first and last numbers together. Multiply the middle pair together. What do you notice?
Kite in a Square
Square Number Surprises
Doesn't add up
In this problem we are faced with an apparently easy area problem, but it has gone horribly wrong! What happened?