#### Fractions 3

Mutiplying and dividing fractions: a systematic approach to this perennial problem.

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GeoGebra is dynamic mathematics software for all levels of education that joins arithmetic, geometry, algebra and calculus. It offers multiple representations of objects in its graphics, algebra, and spreadsheet views that are all dynamically linked.....

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Henry Briggs was the first Gresham Professor of Geometry. In this lecture he describes the College's early days, and surveys the history of the Geometry Chair over the succeeding 400 years.

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Professor MacKay talks about Dasher, and other communication systems designed using information theory; especially communication systems aimed at disabled people.

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#### Looking for patterns in the prime numbers

The prime numbers 2, 3, 5, 7, 11, 13, 17... are those whole numbers with no factors, numbers that divide evenly into larger numbers, other than themselves and 1. They are the building blocks of arithmetic and have fascinated mathematicians for millen....

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A novel way of showing how root 2 can shown to be irrational, using a paper triangle.

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Professor Stewart's Cabinet of Mathematical Curiosities, a surprise Christmas bestseller, is now accompanied by his Hoard of Mathematical Treasures. Both books are mathematical miscellanies for the general public, ranging from one-liners to mini-essa....

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Practical mathematical models are becoming an accepted part of most medical and scientific disciplines. A few of the more unlikely applications are justifying intertribal warfare, the benefits of cannibalism, how the leopard gets its spots and demons....

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Harry gives an introduction to the difficulty of writing large numbers in Roman Numerals

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Making life easy when using percentages. A sometimes fraught topic looked at differently.

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Bill introduces queueing theory and uses it to design the most efficient check out line

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