How is the length of time between the birth of an animal and the birth of its great great ... great grandparent distributed?
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. . . .
Investigate circuits and record your findings in this simple introduction to truth tables and logic.
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.
Simple models which help us to investigate how epidemics grow and die out.
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.
First of all, pick the number of times a week that you would like
to eat chocolate. Multiply this number by 2...
Edward Wallace based his A Level Statistics Project on The Mean
Game. Each picks 2 numbers. The winner is the player who picks a
number closest to the mean of all the numbers picked.
Two cyclists, practising on a track, pass each other at the starting line and go at constant speeds... Can you find lap times that are such that the cyclists will meet exactly half way round the. . . .
How do scores on dice and factors of polynomials relate to each
Explain why, when moving heavy objects on rollers, the object moves
twice as fast as the rollers. Try a similar experiment yourself.
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.
See how differential equations might be used to make a realistic
model of a system containing predators and their prey.
This article explains the concepts involved in scientific
mathematical computing. It will be very useful and interesting to
anyone interested in computer programming or mathematics.
Sixth in our series of problems on population dynamics for advanced students.
This is the section of stemNRICH devoted to the advanced applied
mathematics underlying the study of the sciences at higher levels
At Holborn underground station there is a very long escalator. Two
people are in a hurry and so climb the escalator as it is moving
upwards, thus adding their speed to that of the moving steps. . . .
This article for students introduces the idea of naming knots using numbers. You'll need some paper and something to write with handy!
A car is travelling along a dual carriageway at constant speed. Every 3 minutes a bus passes going in the opposite direction, while every 6 minutes a bus passes the car travelling in the same. . . .
Explore the transformations and comment on what you find.
How do these modelling assumption affect the solutions?
Why MUST these statistical statements probably be at least a little
Fifth in our series of problems on population dynamics for advanced students.
Fourth in our series of problems on population dynamics for advanced students.
PhysNRICH is the area of the StemNRICH site devoted to the mathematics underlying the study of physics
An advanced mathematical exploration supporting our series of articles on population dynamics for advanced students.
Fancy a game of cricket? Here is a mathematical version you can play indoors without breaking any windows.
Invent scenarios which would give rise to these probability density functions.
In this article for teachers, Alan Parr looks at ways that
mathematics teaching and learning can start from the useful and
interesting things can we do with the subject, including. . . .
First in our series of problems on population dynamics for advanced students.
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.
Third in our series of problems on population dynamics for advanced students.
Second in our series of problems on population dynamics for advanced students.
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. . . .
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?
Formulate and investigate a simple mathematical model for the design of a table mat.
An account of how mathematics is used in computer games including
geometry, vectors, transformations, 3D graphics, graph theory and
This is about a fiendishly difficult jigsaw and how to solve it
using a computer program.
The shortest path between any two points on a snooker table is the straight line between them but what if the ball must bounce off one wall, or 2 walls, or 3 walls?
To win on a scratch card you have to uncover three numbers that add
up to more than fifteen. What is the probability of winning a
The third installment in our series on the shape of astronomical systems, this article explores galaxies and the universe beyond our solar system.
What shapes should Elly cut out to make a witch's hat? How can she make a taller hat?
The builders have dug a hole in the ground to be filled with concrete for the foundations of our garage. How many cubic metres of ready-mix concrete should the builders order to fill this hole to. . . .
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?
It is possible to identify a particular card out of a pack of 15
with the use of some mathematical reasoning. What is this reasoning
and can it be applied to other numbers of cards?
At what positions and speeds can the bomb be dropped to destroy the
Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?
This is our collection of tasks on the mathematical theme of 'Population Dynamics' for advanced students and those interested in mathematical modelling.
This problem opens a major sequence of activities on the mathematics of population dynamics for advanced students.