2 out of 3
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 rhombus.
1 out of 3
Imagine a very strange bank account where you are only allowed to do two things...
2 out of 3
Jack has nine tiles. He put them together to make a square so that two tiles of the same colour were not beside each other. Can you find another way to do it?
2 out of 3
Take 5 cubes of one colour and 2 of another colour. How many different ways can you join them if the 5 must touch the table and the 2 must not touch the table?
2 out of 3
Find at least one way to put in some operation signs to make these digits come to 100.
1 out of 3
Can you prove that in every tetrahedron there is a vertex where the three edges meeting at that vertex have lengths which could be the sides of a triangle?
3 out of 3
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects its vertical and horizontal movement at each stage.
1 out of 3
Explore when it is possible to construct a circle which just touches all four sides of a quadrilateral.
3 out of 3
A napkin is folded so that a corner coincides with the midpoint of an opposite edge. Investigate the three triangles formed.
2 out of 3
The farmers want to redraw their field boundary but keep the area the same. Can you advise them?
