Secondary Live Problems

Each time you visit the NRICH site there will be some activities which are 'live'. That means we are inviting you to send us your solutions and we will publish a selection of them, along with your name and your 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?