These activities are part of our Primary collections, which are problems grouped by topic.
![A City of Towers](/sites/default/files/styles/medium/public/thumbnails/content-00-11-letme2-icon.jpg?itok=Ng56Ifpk)
problem
A City of Towers
In this town, houses are built with one room for each person. There are some families of seven people living in the town. In how many different ways can they build their houses?
![Break it up!](/sites/default/files/styles/medium/public/thumbnails/content-id-2284-icon.png?itok=W-LLpaGb)
problem
Break it up!
In how many different ways can you break up a stick of seven interlocking cubes? Now try with a stick of eight cubes and a stick of six cubes. What do you notice?
![Cover the Camel](/sites/default/files/styles/medium/public/thumbnails/content-id-4866-icon.png?itok=erRasJeZ)
![Turning Man](/sites/default/files/styles/medium/public/thumbnails/content-id-5560-icon.png?itok=n0JMA45-)
problem
Turning Man
Use the interactivity to find out how many quarter turns the man must rotate through to look like each of the pictures.
![Turning](/sites/default/files/styles/medium/public/thumbnails/content-id-5656-icon.jpg?itok=LYEtX8dW)
problem
Turning
Use your mouse to move the red and green parts of this disc. Can you make images which show the turnings described?
![Repeating Patterns](/sites/default/files/styles/medium/public/thumbnails/content-id-5944-icon.png?itok=7ybL8Ve9)
problem
Repeating Patterns
Try continuing these patterns made from triangles. Can you create your own repeating pattern?
![En-counters](/sites/default/files/styles/medium/public/thumbnails/content-id-6981-icon.jpg?itok=mrLghLox)
problem
En-counters
This task requires learners to explain and help others, asking and answering questions.
![Triple Cubes](/sites/default/files/styles/medium/public/thumbnails/content-id-7128-icon.jpg?itok=bplVySkT)
problem
Triple Cubes
This challenge involves eight three-cube models made from interlocking cubes. Investigate different ways of putting the models together then compare your constructions.
![Poly Plug Pattern](/sites/default/files/styles/medium/public/thumbnails/content-id-7515-icon.png?itok=DUDUFygU)
problem
Poly Plug Pattern
Create a pattern on the small grid. How could you extend your pattern on the larger grid?
![Walking round a triangle](/sites/default/files/styles/medium/public/thumbnails/content-id-8084-icon.png?itok=QaaBjTy4)
problem
Walking round a triangle
This ladybird is taking a walk round a triangle. Can you see how much he has turned when he gets back to where he started?
![Domino Patterns](/sites/default/files/styles/medium/public/thumbnails/content-id-9970-icon.png?itok=6Gyfp9lN)
![Circles, Circles](/sites/default/files/styles/medium/public/thumbnails/content-id-10829-icon.jpg?itok=nHWb-0Ti)
problem
Circles, Circles
Here are some arrangements of circles. How many circles would I need to make the next size up for each? Can you create your own arrangement and investigate the number of circles it needs?
![Hundred Square](/sites/default/files/styles/medium/public/thumbnails/content-id-2397-icon.gif?itok=CU5wPqS3)
problem
Hundred Square
A hundred square has been printed on both sides of a piece of paper. What is on the back of 100? 58? 23? 19?
![Three Ball Line Up](/sites/default/files/styles/medium/public/thumbnails/content-id-2858-icon.jpg?itok=ePffI8vG)
problem
Three Ball Line Up
Use the interactivity to help get a feel for this problem and to find out all the possible ways the balls could land.
![Triangle Animals](/sites/default/files/styles/medium/public/thumbnails/content-id-4869-icon.png?itok=v9mQHCA-)
problem
Triangle Animals
How many different ways can you find to join three equilateral triangles together? Can you convince us that you have found them all?
![2 Rings](/sites/default/files/styles/medium/public/thumbnails/content-id-5330-icon.png?itok=bNc60kuH)
problem
2 Rings
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?
![Caterpillars](/sites/default/files/styles/medium/public/thumbnails/content-id-5742-icon.png?itok=oNkTmRK-)
problem
Caterpillars
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?
![Olympic rings](/sites/default/files/styles/medium/public/thumbnails/content-id-7551-icon.png?itok=9VbNhDeC)
problem
Olympic rings
Can you design your own version of the Olympic rings, using interlocking squares instead of circles?
![School fair necklaces](/sites/default/files/styles/medium/public/thumbnails/content-id-9692-icon.png?itok=n1rKkkOQ)
problem
School fair necklaces
How many possible symmetrical necklaces can you find? How do you know you've found them all?
![Square split into a triangle and trapezium](/sites/default/files/styles/medium/public/2024-08/Tangram%20Tangle%20featured%20image.png?itok=5kf3WByb)
problem
Tangram Tangle
If you split the square into these two pieces, it is possible to fit the pieces together again to make a new shape. How many new shapes can you make?