### All in the Mind

Imagine you are suspending a cube from one vertex and allowing it to hang freely. What shape does the surface of the water make around the cube?

### Painting Cubes

Imagine you have six different colours of paint. You paint a cube using a different colour for each of the six faces. How many different cubes can be painted using the same set of six colours?

### Tic Tac Toe

In the game of Noughts and Crosses there are 8 distinct winning lines. How many distinct winning lines are there in a game played on a 3 by 3 by 3 board, with 27 cells?

# Cuboids

##### Age 11 to 14Challenge Level

Can you find a cuboid (with edges of whole number lengths) that has a surface area of exactly $100$ square units?

Is there more than one?

Can you find them all?

Can you provide a convincing argument that you have found them all?