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 school. If you'd like to read more about what we're looking for, read this short article.
More problems will be added here in early September. These problems and games will stop being live after Monday 12 October.
These secondary problems have not yet been solved. Can you be the first?