### Two Stones

### Air Nets

### Factors and Multiples Game

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

### Prime Magic

### Colour in the Square

### Dominoes

### Pentanim

### Low Go

### Eight Dominoes

### Two and Two

How many solutions can you find to this sum? Each of the different letters stands for a different number.

### 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...

### What's it worth?

There are lots of different methods to find out what the shapes are worth - how many can you find?

### 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

### 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?

### 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?

### Times right

### Nine Colours

### 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.

### Some Circuits in Graph or Network Theory

### 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?

### Warmsnug Double Glazing

### Equal Equilateral Triangles

### Iffy logic

### Curvy areas

### What's Possible?

### Why 24?

### Pick's Theorem

### 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?