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The Wisdom of the Crowd
problem

The Wisdom of the Crowd

11 to 16

Who's closest to the correct number of sweets in a jar - an individual guess or the average of many individuals' guesses? Which average?

Nine Eigen
problem

Nine Eigen

16 to 18

Explore how matrices can fix vectors and vector directions.

Rose
problem

Rose

16 to 18

What groups of transformations map a regular pentagon to itself?

Summing geometric progressions
problem
Favourite

Summing Geometric Progressions

14 to 18

Watch the video to see how to sum the sequence. Can you adapt the method to sum other sequences?

The yellow NRICH logo above the words 'Early Years', on a blue background.
eyfs_activity

Wrapping Parcels

Age
3 to 5

In this activity, children have the opportunity to wrap some toys and to measure and discuss the size of the box or wrapping paper that they will need.

Arranging the Tables
problem

Arranging the Tables

7 to 11

There are 44 people coming to a dinner party. There are 15 square tables that seat 4 people. Find a way to seat the 44 people using all 15 tables, with no empty places.

Redblue
problem

Redblue

7 to 11

Investigate the number of paths you can take from one vertex to another in these 3D shapes. Is it possible to take an odd number and an even number of paths to the same vertex?

Clapping Times
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?

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