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 submitting solutions to these live problems is Monday 27 November.
problem
Favourite
Sea Level
Age
7 to 11
Challenge level
The picture shows a lighthouse and some underwater creatures. Can you work out the distances between some of the different creatures?
