### All in the Mind

Imagine you are suspending a cube from one vertex (corner) and allowing it to hang freely. Now imagine you are lowering it into water until it is exactly half submerged. 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?

### The Old Goats

A rectangular field has two posts with a ring on top of each post. There are two quarrelsome goats and plenty of ropes which you can tie to their collars. How can you secure them so they can't fight each other but can reach every corner of the field?

# Disappearing Square

##### Stage: 3 Challenge Level:

The area of a triangle is found by multiplying the base by the height then halving your answer.

(Be careful not to use the length of a side but the height from base to apex.)

Could this be to do with the way the squares are drawn? Look out for the parts of squares and how they are matched up.