These activities are part of our Primary collections, which are problems grouped by topic.
![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.
![A Cartesian Puzzle](/sites/default/files/styles/medium/public/thumbnails/content-02-05-penta2-icon.jpg?itok=SOsXIr02)
problem
A Cartesian Puzzle
Find the missing coordinates which will form these eight quadrilaterals. These coordinates themselves will then form a shape with rotational and line symmetry.
![Transformations on a Pegboard](/sites/default/files/styles/medium/public/thumbnails/content-03-07-letme2-icon.gif?itok=iyDgxaxE)
problem
Transformations on a Pegboard
How would you move the bands on the pegboard to alter these shapes?
![Coordinate Challenge](/sites/default/files/styles/medium/public/thumbnails/content-id-5038-icon.jpg?itok=KAFdXOKr)
problem
Coordinate Challenge
Use the clues about the symmetrical properties of these letters to place them on the grid.
![Treasure Hunt](/sites/default/files/styles/medium/public/thumbnails/content-id-6288-icon.jpg?itok=2AbCpMXX)
problem
Treasure Hunt
Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?
![Eight hidden squares](/sites/default/files/styles/medium/public/thumbnails/content-id-6280-icon.png?itok=5Lk-UDhJ)
problem
Eight hidden squares
On the graph there are 28 marked points. These points all mark the vertices (corners) of eight hidden squares. Can you find the eight hidden squares?
![Ten Hidden Squares](/sites/default/files/styles/medium/public/thumbnails/content-id-2654-icon.jpg?itok=DtKAVnoL)
problem
Ten Hidden Squares
These points all mark the vertices (corners) of ten hidden squares. Can you find the 10 hidden squares?