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A 1 metre cube has one face on the ground and one face against a wall. A 4 metre ladder leans against the wall and just touches the cube. How high is the top of the ladder above the ground?

Four rods are hinged at their ends to form a convex quadrilateral. Investigate the different shapes that the quadrilateral can take. Be patient this problem may be slow to load.

### Three Cubes

Can you work out the dimensions of the three cubes?

# Square Overlap

##### Age 14 to 16 Short Challenge Level:

Two squares of side length 2 cm are placed top of each other so that the angle between the squares is 60$^\text{o}$. What is the area of the overlap?

This problem is adapted from the World Mathematics Championships
You can find more short problems, arranged by curriculum topic, in our short problems collection.