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Stats statements
problem
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Stats statements

16 to 18
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Are these statistical statements sometimes, always or never true? Or it is impossible to say?

Gamma City
problem

Gamma city

14 to 16
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Can you find the mode and median number of goals scored by Gamma City?
Sperner's Lemma
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.
The yellow NRICH logo above the words 'Early Years', on a turquoise background.
eyfs_activity

Hidden jewels

Age
3 to 5

In this 'hide and reveal' game, children are encouraged to say the number of gems without counting them.

Power match
problem
Favourite

Power match

16 to 18
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Can you locate these values on this interactive logarithmic scale?

Playing with factors and multiples
article

Playing with factors and multiples

5 to 11

This article for primary teachers outlines why developing an intuitive 'feel' for numbers matters, and how our activities focusing on factors and multiples can help.

Euler's Formula
article

Euler's formula

16 to 18
Some simple ideas about graph theory with a discussion of a proof of Euler's formula relating the numbers of vertces, edges and faces of a graph.
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