Andy wants to cycle from Land's End to John o'Groats. Will he be able to eat enough to keep him going?

Which dilutions can you make using only 10ml pipettes?

Examine these estimates. Do they sound about right?

Get some practice using big and small numbers in chemistry.

Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.

Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?

Work with numbers big and small to estimate and calculate various quantities in biological contexts.

Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?

When you change the units, do the numbers get bigger or smaller?

Work with numbers big and small to estimate and calculate various quantities in physical contexts.

Which units would you choose best to fit these situations?

Formulate and investigate a simple mathematical model for the design of a table mat.

Estimate these curious quantities sufficiently accurately that you can rank them in order of size

In which Olympic event does a human travel fastest? Decide which events to include in your Alternative Record Book.

Work out the numerical values for these physical quantities.

Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

Where should runners start the 200m race so that they have all run the same distance by the finish?

Can you sketch graphs to show how the height of water changes in different containers as they are filled?

Make your own pinhole camera for safe observation of the sun, and find out how it works.

Make an accurate diagram of the solar system and explore the concept of a grand conjunction.

Is it cheaper to cook a meal from scratch or to buy a ready meal? What difference does the number of people you're cooking for make?

Starting with two basic vector steps, which destinations can you reach on a vector walk?

If I don't have the size of cake tin specified in my recipe, will the size I do have be OK?

How would you design the tiering of seats in a stadium so that all spectators have a good view?

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

Use trigonometry to determine whether solar eclipses on earth can be perfect.

These Olympic quantities have been jumbled up! Can you put them back together again?

10 graphs of experimental data are given. Can you use a spreadsheet to find algebraic graphs which match them closely, and thus discover the formulae most likely to govern the underlying processes?

Can you deduce which Olympic athletics events are represented by the graphs?

Explore the relationship between resistance and temperature

Analyse these beautiful biological images and attempt to rank them in size order.

An observer is on top of a lighthouse. How far from the foot of the lighthouse is the horizon that the observer can see?

Is there a temperature at which Celsius and Fahrenheit readings are the same?

Work with numbers big and small to estimate and calulate various quantities in biological contexts.

The triathlon is a physically gruelling challenge. Can you work out which athlete burnt the most calories?

How would you go about estimating populations of dolphins?

Investigate circuits and record your findings in this simple introduction to truth tables and logic.

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

Imagine different shaped vessels being filled. Can you work out what the graphs of the water level should look like?

Two trains set off at the same time from each end of a single straight railway line. A very fast bee starts off in front of the first train and flies continuously back and forth between the. . . .

How do you write a computer program that creates the illusion of stretching elastic bands between pegs of a Geoboard? The answer contains some surprising mathematics.

Simple models which help us to investigate how epidemics grow and die out.