If a is the radius of the axle, b the radius of each ball-bearing, and c the radius of the hub, why does the number of ball bearings n determine the ratio c/a? Find a formula for c/a in terms of n.
Learn about the link between logical arguments and electronic circuits. Investigate the logical connectives by making and testing your own circuits and fill in the blanks in truth tables to record. . . .
How efficiently can you pack together disks?
Investigate circuits and record your findings in this simple introduction to truth tables and logic.
Invent scenarios which would give rise to these probability density functions.
This is our collection of tasks on the mathematical theme of 'Population Dynamics' for advanced students and those interested in mathematical modelling.
How is the length of time between the birth of an animal and the birth of its great great ... great grandparent distributed?
Which line graph, equations and physical processes go together?
Why MUST these statistical statements probably be at least a little
Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?
Can Jo make a gym bag for her trainers from the piece of fabric she has?
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.
The probability that a passenger books a flight and does not turn
up is 0.05. For an aeroplane with 400 seats how many tickets can be
sold so that only 1% of flights are over-booked?
Can you match these equations to these graphs?
Can you draw the height-time chart as this complicated vessel fills
Was it possible that this dangerous driving penalty was issued in
Match the charts of these functions to the charts of their integrals.
How would you go about estimating populations of dolphins?
Get further into power series using the fascinating Bessel's equation.
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?
Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.
Get some practice using big and small numbers in chemistry.
Formulate and investigate a simple mathematical model for the design of a table mat.
Can you visualise whether these nets fold up into 3D shapes? Watch the videos each time to see if you were correct.
Use the computer to model an epidemic. Try out public health policies to control the spread of the epidemic, to minimise the number of sick days and deaths.
Here are several equations from real life. Can you work out which measurements are possible from each equation?
Estimate these curious quantities sufficiently accurately that you can rank them in order of size
Imagine different shaped vessels being filled. Can you work out
what the graphs of the water level should look like?
See how enormously large quantities can cancel out to give a good
approximation to the factorial function.
Can you find the volumes of the mathematical vessels?
How much energy has gone into warming the planet?
Each week a company produces X units and sells p per cent of its
stock. How should the company plan its warehouse space?
This problem explores the biology behind Rudolph's glowing red nose.
Match the descriptions of physical processes to these differential
An observer is on top of a lighthouse. How far from the foot of the lighthouse is the horizon that the observer can see?
By exploring the concept of scale invariance, find the probability
that a random piece of real data begins with a 1.
Find the distance of the shortest air route at an altitude of 6000
metres between London and Cape Town given the latitudes and
longitudes. A simple application of scalar products of vectors.
Shows that Pythagoras for Spherical Triangles reduces to
Pythagoras's Theorem in the plane when the triangles are small
relative to the radius of the sphere.
Look at the advanced way of viewing sin and cos through their power series.
Which units would you choose best to fit these situations?
Work with numbers big and small to estimate and calculate various quantities in biological contexts.
Work with numbers big and small to estimate and calculate various quantities in physical contexts.
Are these statistical statements sometimes, always or never true?
Or it is impossible to say?
When you change the units, do the numbers get bigger or smaller?
Build up the concept of the Taylor series
To investigate the relationship between the distance the ruler drops and the time taken, we need to do some mathematical modelling...
A problem about genetics and the transmission of disease.
Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?
Explore the shape of a square after it is transformed by the action
of a matrix.