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NRICH and Olympiads
A useful entry point into the NRICH site for those students interested in Mathematical Olympiad problems or the Maths Challenges.
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article
Continued Fractions I
An article introducing continued fractions with some simple puzzles for the reader.
problem
World of Tan 6 - Junk
7 to 11
Can you fit the tangram pieces into the silhouette of the junk?
problem
Königsberg
11 to 14
Can you cross each of the seven bridges that join the north and south of the river to the two islands, once and once only, without retracing your steps?
problem
Lennard Jones Potential
16 to 18
Investigate why the Lennard-Jones potential gives a good approximate explanation for the behaviour of atoms at close ranges
problem
Mach Attack
16 to 18
Have you got the Mach knack? Discover the mathematics behind exceeding the sound barrier.
article
Winning Lines
An article for teachers and pupils that encourages you to look at the mathematical properties of similar games.
problem
Favourite
Clapping Times
5 to 7
If you count from 1 to 20 and clap more loudly on the numbers in the two times table, as well as saying those numbers loudly, which numbers will be loud?
