Challenge Level

Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.

Challenge Level

Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.

Challenge Level

Here are some rods that are different colours. How could I make a yellow rod using white and red rods?

Challenge Level

How many trains can you make which are the same length as Matt's and Katie's, using rods that are identical?

Challenge Level

There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?

Challenge Level

Place six toy ladybirds into the box so that there are two ladybirds in every column and every row.

Challenge Level

Is it possible to place 2 counters on the 3 by 3 grid so that there is an even number of counters in every row and every column? How about if you have 3 counters or 4 counters or....?

Challenge Level

Place the numbers 1 to 10 in the circles so that each number is the difference between the two numbers just below it.

Challenge Level

What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?

Challenge Level

Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.

Challenge Level

Can you put the numbers 1 to 8 into the circles so that the four calculations are correct?

Challenge Level

Have a go at this well-known challenge. Can you swap the frogs and toads in as few slides and jumps as possible?

Challenge Level

Calculate the fractional amounts of money to match pairs of cards with the same value.

Challenge Level

Can you find all the different triangles on these peg boards, and find their angles?

Challenge Level

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.

Challenge Level

A game for two people that can be played with pencils and paper. Combine your knowledge of coordinates with some strategic thinking.

Challenge Level

This problem is based on a code using two different prime numbers less than 10. You'll need to multiply them together and shift the alphabet forwards by the result. Can you decipher the code?

Challenge Level

These interactive dominoes can be dragged around the screen.

Challenge Level

Can you put the 25 coloured tiles into the 5 x 5 square so that no column, no row and no diagonal line have tiles of the same colour in them?

Challenge Level

Terry and Ali are playing a game with three balls. Is it fair that Terry wins when the middle ball is red?

Challenge Level

Take it in turns to make a triangle on the pegboard. Can you block your opponent?

Challenge Level

This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?

Challenge Level

Cut four triangles from a square as shown in the picture. How many different shapes can you make by fitting the four triangles back together?

Challenge Level

A train building game for two players. Can you be the one to complete the train?

Challenge Level

Practise your tables skills and try to beat your previous best score in this interactive game.

Challenge Level

In this game you are challenged to gain more columns of lily pads than your opponent.

Challenge Level

Practise your number bonds whilst improving your memory in this matching pairs game.

Challenge Level

This is a game for two players. Can you find out how to be the first to get to 12 o'clock?

Challenge Level

Watch this film carefully. Can you find a general rule for explaining when the dot will be this same distance from the horizontal axis?

Challenge Level

Sort the houses in my street into different groups. Can you do it in any other ways?

Challenge Level

How many different triangles can you draw on the dotty grid which each have one dot in the middle?

Challenge Level

Use the interactivities to fill in these Carroll diagrams. How do you know where to place the numbers?

Challenge Level

Play this well-known game against the computer where each player is equally likely to choose scissors, paper or rock. Why not try the variations too?

Challenge Level

Stop the Clock game for an adult and child. How can you make sure you always win this game?

Challenge Level

Board Block game for two. Can you stop your partner from being able to make a shape on the board?

Challenge Level

Train game for an adult and child. Who will be the first to make the train?

Challenge Level

Use your mouse to move the red and green parts of this disc. Can you make images which show the turnings described?

Challenge Level

Use the interactivity to find all the different right-angled triangles you can make by just moving one corner of the starting triangle.

Challenge Level

First Connect Three game for an adult and child. Use the dice numbers and either addition or subtraction to get three numbers in a straight line.

Challenge Level

Use the interactivity to find out how many quarter turns the man must rotate through to look like each of the pictures.

Challenge Level

In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?

Challenge Level

Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

The 2012 primary advent calendar features twenty-four of our posters, one for each day in the run-up to Christmas.

Challenge Level

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.

Challenge Level

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

Challenge Level

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

Challenge Level

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