Can you use the numbers on the dice to reach your end of the number line before your partner beats you?
Can you complete this jigsaw of the 100 square?
Can you hang weights in the right place to make the equaliser balance?
Use the interactivity to find out how many quarter turns the man must rotate through to look like each of the pictures.
Use the interactivities to fill in these Carroll diagrams. How do you know where to place the numbers?
Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.
Here are some rods that are different colours. How could I make a dark green rod using yellow and white rods?
Can you work out how to balance this equaliser? You can put more than one weight on a hook.
If there are 3 squares in the ring, can you place three different numbers in them so that their differences are odd? Try with different numbers of squares around the ring. What do you notice?
Sort the houses in my street into different groups. Can you do it in any other ways?
Choose four of the numbers from 1 to 9 to put in the squares so that the differences between joined squares are odd.
Use the information about Sally and her brother to find out how many children there are in the Brown family.
How many different triangles can you draw on the dotty grid which each have one dot in the middle?
Can you sort these triangles into three different families and explain how you did it?
Complete the squares - but be warned some are trickier than they look!
What does the overlap of these two shapes look like? Try picturing it in your head and then use the interactivity to test your prediction.
Incey Wincey Spider game for an adult and child. Will Incey get to the top of the drainpipe?
The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?
An environment which simulates working with Cuisenaire rods.
How many different ways can you find to join three equilateral triangles together? Can you convince us that you have found them all?
Ben and his mum are planting garlic. Use the interactivity to help you find out how many cloves of garlic they might have had.
Can you cover the camel with these pieces?
If you hang two weights on one side of this balance, in how many different ways can you hang three weights on the other side for it to be balanced?
Choose a symbol to put into the number sentence.
There are three versions of this challenge. The idea is to change the colour of all the spots on the grid. Can you do it in fewer throws of the dice?
Take it in turns to place a domino on the grid. One to be placed horizontally and the other vertically. Can you make it impossible for your opponent to play?
Use your mouse to move the red and green parts of this disc. Can you make images which show the turnings described?
An odd version of tic tac toe
Take it in turns to make a triangle on the pegboard. Can you block your opponent?
Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?
Arrange any number of counters from these 18 on the grid to make a rectangle. What numbers of counters make rectangles? How many different rectangles can you make with each number of counters?
This 100 square jigsaw is written in code. It starts with 1 and ends with 100. Can you build it up?
Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.
Twenty four games for the run-up to Christmas.
Investigate which numbers make these lights come on. What is the smallest number you can find that lights up all the lights?
Mr Gilderdale is playing a game with his class. What rule might he have chosen? How would you test your idea?
Stop the Clock game for an adult and child. How can you make sure you always win this game?
Create a pattern on the left-hand grid. How could you extend your pattern on the right-hand grid?
How many trains can you make which are the same length as Matt's, using rods that are identical?
Can you find just the right bubbles to hold your number?
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
Make one big triangle so the numbers that touch on the small triangles add to 10. You could use the interactivity to help you.
Imagine a wheel with different markings painted on it at regular intervals. Can you predict the colour of the 18th mark? The 100th mark?
If you can post the triangle with either the blue or yellow colour face up, how many ways can it be posted altogether?
Match the halves.
How many right angles can you make using two sticks?
Move just three of the circles so that the triangle faces in the opposite direction.
A variant on the game Alquerque
Use the number weights to find different ways of balancing the equaliser.
Can you put the numbers 1 to 8 into the circles so that the four calculations are correct?