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

If you are given the mean, median and mode of five positive whole numbers, can you find the numbers?

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.

How many winning lines can you make in a three-dimensional version of noughts and crosses?

Imagine you have an unlimited number of four types of triangle. How many different tetrahedra can you make?

A spider is sitting in the middle of one of the smallest walls in a room and a fly is resting beside the window. What is the shortest distance the spider would have to crawl to catch the fly?

A hexagon, with sides alternately a and b units in length, is inscribed in a circle. How big is the radius of the circle?

How many different symmetrical shapes can you make by shading triangles or squares?

Why not challenge a friend to play this transformation game?

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

Generate three random numbers to determine the side lengths of a triangle. What triangles can you draw?

If you move the tiles around, can you make squares with different coloured edges?

Draw some isosceles triangles with an area of $9$cm$^2$ and a vertex at (20,20). If all the vertices must have whole number coordinates, how many is it possible to draw?

Can you find a cuboid that has a surface area of exactly 100 square units. Is there more than one? Can you find them all?

Play around with sets of five numbers and see what you can discover about different types of average...

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...

Can you do a little mathematical detective work to figure out which number has been wiped out?

Match the cumulative frequency curves with their corresponding box plots.

Infographics are a powerful way of communicating statistical information. Can you come up with your own?

Find the frequency distribution for ordinary English, and use it to help you crack the code.

Move your counters through this snake of cards and see how far you can go. Are you surprised by where you end up?

Engage in a little mathematical detective work to see if you can spot the fakes.

Imagine a room full of people who keep flipping coins until they get a tail. Will anyone get six heads in a row?

Chris and Jo put two red and four blue ribbons in a box. They each pick a ribbon from the box without looking. Jo wins if the two ribbons are the same colour. Is the game fair?

Seven balls are shaken. You win if the two blue balls end up touching. What is the probability of winning?

Six balls are shaken. You win if at least one red ball ends in a corner. What is the probability of winning?

Can you work out which spinners were used to generate the frequency charts?

A game for 2 or more people, based on the traditional card game Rummy.

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?

What happens when you add a three digit number to its reverse?

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

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

Use the differences to find the solution to this Sudoku.

The clues for this Sudoku are the product of the numbers in adjacent squares.

Using the digits 1 to 9, the number 4396 can be written as the product of two numbers. Can you find the factors?

Can you find a relationship between the number of dots on the circle and the number of steps that will ensure that all points are hit?

A country has decided to have just two different coins, 3z and 5z coins. Which totals can be made? Is there a largest total that cannot be made? How do you know?

Do you know a quick way to check if a number is a multiple of two? How about three, four or six?

Charlie and Abi put a counter on 42. They wondered if they could visit all the other numbers on their 1-100 board, moving the counter using just these two operations: x2 and -5. What do you think?

Imagine you were given the chance to win some money... and imagine you had nothing to lose...

What is the smallest number of answers you need to reveal in order to work out the missing headers?

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

My two digit number is special because adding the sum of its digits to the product of its digits gives me my original number. What could my number be?

Interior angles can help us to work out which polygons will tessellate. Can we use similar ideas to predict which polygons combine to create semi-regular solids?

Where should you start, if you want to finish back where you started?

Can you find the hidden factors which multiply together to produce each quadratic expression?

Can you find the values at the vertices when you know the values on the edges?

Can you find the values at the vertices when you know the values on the edges of these multiplication arithmagons?