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article

Sperner's lemma

16 to 18

An article about the strategy for playing The Triangle Game which appears on the NRICH site. It contains a simple lemma about labelling a grid of equilateral triangles within a triangular frame.

article

Winning lines

7 to 16

An article for teachers and pupils that encourages you to look at the mathematical properties of similar games.

project

Epidemics on networks

11 to 16

This activity introduces students to networks, and enourages them to consider these in the context of social networks and diseases.

article

Place your counters...

5 to 11

An article for teachers which first appeared in the MA's Equals journal, featuring activities which use counters.

problem

Calendar calculations

7 to 11

Try adding together the dates of all the days in one week. Now multiply the first date by 7 and add 21. Can you explain what happens?

problem

The perforated cube

14 to 16

A cube is made from smaller cubes, 5 by 5 by 5, then some of those cubes are removed. Can you make the specified shapes, and what is the most and least number of cubes required ?