What statements can you make about the car that passes the school gates at 11am on Monday? How will you come up with statements and test your ideas?
Take a look at these data collected by children in 1986 as part of the Domesday Project. What do they tell you? What do you think about the way they are presented?
What can you say about the child who will be first on the playground tomorrow morning at breaktime in your school?
In this challenge, you will work in a group to investigate circular
fences enclosing trees that are planted in square or triangular
What is the smallest number of tiles needed to tile this patio? Can
you investigate patios of different sizes?
In this article for teachers, Bernard gives an example of taking an
initial activity and getting questions going that lead to other
In this investigation we are going to count the number of 1s, 2s, 3s etc in numbers. Can you predict what will happen?
Sort the houses in my street into different groups. Can you do it in any other ways?
Explore one of these five pictures.
How many ways can you find of tiling the square patio, using square
tiles of different sizes?
These pictures show squares split into halves. Can you find other ways?
Have a go at this 3D extension to the Pebbles problem.
Bernard Bagnall describes how to get more out of some favourite
Investigate all the different squares you can make on this 5 by 5
grid by making your starting side go from the bottom left hand
point. Can you find out the areas of all these squares?
Follow the directions for circling numbers in the matrix. Add all
the circled numbers together. Note your answer. Try again with a
different starting number. What do you notice?
Explore Alex's number plumber. What questions would you like to ask? Don't forget to keep visiting NRICH projects site for the latest developments and questions.
Complete these two jigsaws then put one on top of the other. What
happens when you add the 'touching' numbers? What happens when you
change the position of the jigsaws?
If I use 12 green tiles to represent my lawn, how many different
ways could I arrange them? How many border tiles would I need each
This activity asks you to collect information about the birds you
see in the garden. Are there patterns in the data or do the birds
seem to visit randomly?
What is the largest number of circles we can fit into the frame
without them overlapping? How do you know? What will happen if you
try the other shapes?
Why does the tower look a different size in each of these pictures?
A follow-up activity to Tiles in the Garden.
This problem is intended to get children to look really hard at something they will see many times in the next few months.
Investigate how this pattern of squares continues. You could
measure lengths, areas and angles.
Many natural systems appear to be in equilibrium until suddenly a critical point is reached, setting up a mudslide or an avalanche or an earthquake. In this project, students will use a simple. . . .
Explore Alex's number plumber. What questions would you like to ask? What do you think is happening to the numbers?
Explore the different tunes you can make with these five gourds.
What are the similarities and differences between the two tunes you
This challenge asks you to investigate the total number of cards that would be sent if four children send one to all three others. How many would be sent if there were five children? Six?
All types of mathematical problems serve a useful purpose in
mathematics teaching, but different types of problem will achieve
different learning objectives. In generalmore open-ended problems
have. . . .
What do these two triangles have in common? How are they related?
These caterpillars have 16 parts. What different shapes do they make if each part lies in the small squares of a 4 by 4 square?
Is there a best way to stack cans? What do different supermarkets
do? How high can you safely stack the cans?
An investigation that gives you the opportunity to make and justify
I cut this square into two different shapes. What can you say about
the relationship between them?
Use the interactivity to investigate what kinds of triangles can be
drawn on peg boards with different numbers of pegs.
48 is called an abundant number because it is less than the sum of its factors (without itself). Can you find some more abundant numbers?
How many shapes can you build from three red and two green cubes? Can you use what you've found out to predict the number for four red and two green?
In this investigation, you are challenged to make mobile phone
numbers which are easy to remember. What happens if you make a
sequence adding 2 each time?
An activity making various patterns with 2 x 1 rectangular tiles.
Explore ways of colouring this set of triangles. Can you make
Investigate what happens when you add house numbers along a street
in different ways.
In this investigation, you must try to make houses using cubes. If
the base must not spill over 4 squares and you have 7 cubes which
stand for 7 rooms, what different designs can you come up with?
This challenge encourages you to explore dividing a three-digit number by a single-digit number.
Try continuing these patterns made from triangles. Can you create your own repeating pattern?
Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?
What is the smallest cuboid that you can put in this box so that
you cannot fit another that's the same into it?
How many different ways can you find of fitting five hexagons
together? How will you know you have found all the ways?
The red ring is inside the blue ring in this picture. Can you rearrange the rings in different ways? Perhaps you can overlap them or put one outside another?
Can you find out how the 6-triangle shape is transformed in these
tessellations? Will the tessellations go on for ever? Why or why
Can you continue this pattern of triangles and begin to predict how many sticks are used for each new "layer"?