Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?

Can you explain why every year must contain at least one Friday the thirteenth?

What size square corners should be cut from a square piece of paper to make a box with the largest possible volume?

Christmas trees are planted in a rectangular array. Which is the taller tree, A or B?

Sometime during every hour the minute hand lies directly above the hour hand. At what time between 4 and 5 o'clock does this happen?

A collection of short Stage 3 and 4 problems on Mathematical Modelling.

A chance to explore the mathematics of networks as applied to epidemics and the spread of disease.

Have you ever wondered what it would be like to race against Usain Bolt?

Can you work out which processes are represented by the graphs?

A ladder 3m long rests against a wall with one end a short distance from its base. Between the wall and the base of a ladder is a garden storage box 1m tall and 1m high. What is the maximum distance up the wall which the ladder can reach?

Chris is enjoying a swim but needs to get back for lunch. If she can swim at 3 m/s and run at 7m/sec, how far along the bank should she land in order to get back as quickly as possible?

How do these modelling assumption affect the solutions?

10 intriguing starters related to the mechanics of sport.

Work in groups to try to create the best approximations to these physical quantities.

Was it possible that this dangerous driving penalty was issued in error?

See how the motion of the simple pendulum is not-so-simple after all.