
The Seven Hat Problem and Error Correcting Codes
The power of mathematical notation and reasoning is exploited to relate a famous recreational mathematics problem (hat problem) with an important method for sending and receiving messages that have a small percentage of errors (Hamming codes). The pr....
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Algebra
How simple algebra can be used to investigate cubes and other polyhedra up to icosahedra.
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Numbers HK
Harry gives an introduction to the difficulty of writing large numbers in Roman Numerals
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Algebra with Chinese subtitles
How simple algebra can be used to investigate cubes and other polyhedra up to icosahedra.
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Square Roots 2

All numbers are not equal
An introduction to the various types of numbers which are recognised as important.
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Fractions 2
An approach to adding and subtracting fractions, using an understanding of the processes involved.
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Fractions 1
How can we represent fractions in the simplest way? Equivalence of decimal and common fractions.
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Fractions 3
Mutiplying and dividing fractions: a systematic approach to this perennial problem.
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Percentages
Making life easy when using percentages. A sometimes fraught topic looked at differently.
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