Problem solving is at the heart of the NRICH site. All the problems
give learners opportunities to learn, develop or use mathematical
concepts and skills. Read here for more information.
The net of a cube is to be cut from a sheet of card 100 cm square.
What is the maximum volume cube that can be made from a single
piece of card?
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.
Scheduling games is a little more challenging than one might desire. Here are some tournament formats that sport schedulers use.
Explain why, when moving heavy objects on rollers, the object moves
twice as fast as the rollers. Try a similar experiment yourself.
An introduction to bond angle geometry.
See how differential equations might be used to make a realistic
model of a system containing predators and their prey.
What is the longest stick that can be carried horizontally along a
narrow corridor and around a right-angled bend?
This problem opens a major sequence of activities on the mathematics of population dynamics for advanced students.
Scientist Bryan Rickett has a vision of the future - and it is one
in which self-parking cars prowl the tarmac plains, hunting down
suitable parking spots and manoeuvring elegantly into them.
In Classical times the Pythagorean philosophers believed that all
things were made up from a specific number of tiny indivisible
particles called ‘monads’. Each object contained. . . .
How efficiently can various flat shapes be fitted together?
How can people be divided into groups fairly for events in the Paralympics, for school sports days, or for subject sets?
A simple method of defining the coefficients in the equations of chemical reactions with the help of a system of linear algebraic equations.
This is our collection of tasks on the mathematical theme of 'Population Dynamics' for advanced students and those interested in mathematical modelling.
Financial markets mean the business of trading risk. The article
describes in simple terms what is involved in this trading, the
work people do and the figures for starting salaries.
Noticing the regular movement of the Sun and the stars has led to a desire to measure time. This article for teachers and learners looks at the history of man's need to measure things.
How do decisions about scoring affect who wins a combined event such as the decathlon?
An introduction to the ideas of public key cryptography using small
numbers to explain the process. In practice the numbers used are
too large to factorise in a reasonable time.
Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?
engNRICH is the area of the stemNRICH Advanced site devoted to the mathematics underlying the study of engineering
bioNRICH is the area of the stemNRICH site devoted to the
mathematics underlying the study of the biological sciences,
designed to help develop the mathematics required to get the most
from your. . . .
PhysNRICH is the area of the StemNRICH site devoted to the mathematics underlying the study of physics
Design and construct a prototype intercooler which will satisfy agreed quality control constraints.
How many eggs should a bird lay to maximise the number of chicks
that will hatch? An introduction to optimisation.
In this article, Alan Parr shares his experiences of the motivating effect sport can have on the learning of mathematics.
Can Jo make a gym bag for her trainers from the piece of fabric she has?
STEM students at university often encounter mathematical difficulties. This articles highlights the various content problems and the 7 key process problems encountered by STEM students.
From the information you are asked to work out where the picture
was taken. Is there too much information? How accurate can your
An example of a simple Public Key code, called the Knapsack Code is
described in this article, alongside some information on its
origins. A knowledge of modular arithmetic is useful.
If the score is 8-8 do I have more chance of winning if the winner
is the first to reach 9 points or the first to reach 10 points?
For teachers. Yet more school maths from long ago-interest and
Playing squash involves lots of mathematics. This article explores
the mathematics of a squash match and how a knowledge of
probability could influence the choices you make.
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?
In four years 2001 to 2004 Arsenal have been drawn against Chelsea
in the FA cup and have beaten Chelsea every time. What was the
probability of this? Lots of fractions in the calculations!
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.
An observer is on top of a lighthouse. How far from the foot of the lighthouse is the horizon that the observer can see?
A look at the fluid mechanics questions that are raised by the
As part of Liverpool08 European Capital of Culture there were a
huge number of events and displays. One of the art installations
was called "Turning the Place Over". Can you find our how it works?
From the atomic masses recorded in a mass spectrometry analysis can
you deduce the possible form of these compounds?
Is it really greener to go on the bus, or to buy local?
Work in groups to try to create the best approximations to these
Each week a company produces X units and sells p per cent of its
stock. How should the company plan its warehouse space?
chemNRICH is the area of the stemNRICH site devoted to the
mathematics underlying the study of chemistry, designed to help
develop the mathematics required to get the most from your study. . . .