See how enormously large quantities can cancel out to give a good approximation to the factorial function.
Is the age of this very old man statistically believable?
Given the equation for the path followed by the back wheel of a bike, can you solve to find the equation followed by the front wheel?
Which parts of these framework bridges are in tension and which parts are in compression?
Dip your toe into the fascinating topic of genetics. From Mendel's theories to some cutting edge experimental techniques, this article gives an insight into some of the processes underlying. . . .
Work out the numerical values for these physical quantities.
How much energy has gone into warming the planet?
Explore the power of aeroplanes, spaceships and horses.
By exploring the concept of scale invariance, find the probability that a random piece of real data begins with a 1.
Get further into power series using the fascinating Bessel's equation.
An article demonstrating mathematically how various physical modelling assumptions affect the solution to the seemingly simple problem of the projectile.
Work with numbers big and small to estimate and calculate various quantities in physical contexts.
Get some practice using big and small numbers in chemistry.
Work with numbers big and small to estimate and calculate various quantities in biological contexts.
Read all about electromagnetism in our interactive article.
Ever wondered what it would be like to vaporise a diamond? Find out inside...
An introduction to a useful tool to check the validity of an equation.
Have you got the Mach knack? Discover the mathematics behind exceeding the sound barrier.
How fast would you have to throw a ball upwards so that it would never land?
Explore the properties of this different sort of differential equation.
Can you deduce why common salt isn't NaCl_2?
Take any pair of numbers, say 9 and 14. Take the larger number, fourteen, and count up in 14s. Then divide each of those values by the 9, and look at the remainders.
On a "move" a stone is removed from two of the circles and placed in the third circle. Here are five of the ways that 27 stones could be distributed.
Take ten sticks in heaps any way you like. Make a new heap using one from each of the heaps. By repeating that process could the arrangement 7 - 1 - 1 - 1 ever turn up, except by starting with it?
Where we follow twizzles to places that no number has been before.
Some of our more advanced investigations
We all know that smoking poses a long term health risk and has the potential to cause cancer. But what actually happens when you light up a cigarette, place it to your mouth, take a tidal breath. . . .
Unearth the beautiful mathematics of symmetry whilst investigating the properties of crystal lattices
Investigate constructible images which contain rational areas.
Formulate and investigate a simple mathematical model for the design of a table mat.
An introduction to bond angle geometry.
Two perpendicular lines lie across each other and the end points are joined to form a quadrilateral. Eight ratios are defined, three are given but five need to be found.
Read about the mathematics behind the measuring devices used in quantitative chemistry
Two polygons fit together so that the exterior angle at each end of their shared side is 81 degrees. If both shapes now have to be regular could the angle still be 81 degrees?
How much peel does an apple have?
This article (the first of two) contains ideas for investigations. Space-time, the curvature of space and topology are introduced with some fascinating problems to explore.
Build up the concept of the Taylor series
Can you find some Pythagorean Triples where the two smaller numbers differ by 1?
Looking at small values of functions. Motivating the existence of the Taylor expansion.
A simplified account of special relativity and the twins paradox.
Explore the properties of combinations of trig functions in this open investigation.
We think this 3x3 version of the game is often harder than the 5x5 version. Do you agree? If so, why do you think that might be?
When is a knot invertible ?
What's the chance of a pair of lists of numbers having sample correlation exactly equal to zero?
Investigate x to the power n plus 1 over x to the power n when x plus 1 over x equals 1.
Draw three equal line segments in a unit circle to divide the circle into four parts of equal area.
Look at the advanced way of viewing sin and cos through their power series.
All types of mathematical problems serve a useful purpose in mathematics teaching, but different types of problem will achieve different learning objectives. In generalmore open-ended problems have. . . .
Find all the periodic cycles and fixed points in this number sequence using any whole number as a starting point.
What functions can you make using the function machines RECIPROCAL and PRODUCT and the operator machines DIFF and INT?