Live Problems - Stage 3, 4 & 5

Each time students visit the NRICH site there will be some activities which are 'live'. That means we are inviting students to send us their solutions and we will publish a selection of them, along with their name and school's name. If you'd like to know more about what we're looking for, read this short article.

The last day for sending in solutions to these live problems is Monday 11 October.

Can You Traverse It?live

Age 14 to 18
Challenge Level

How can you decide if a graph is traversable?

Network Treeslive

Age 14 to 18
Challenge Level

Explore some of the different types of network, and prove a result about network trees.

Euler Meets Schlegellive

Age 16 to 18
Challenge Level

Discover how networks can be used to prove Euler's Polyhedron formula.

Secondary Toughnutslive

Age 11 to 18
Challenge Level

These secondary problems have not yet been solved. Can you be the first?

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.
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NRICH is part of the family of activities in the Millennium Mathematics Project.