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 27 November.
Dozens
Can you select the missing digit(s) to find the largest multiple?
Fruity totals
In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?
Secondary Toughnuts
Have you got it?
Can you explain the strategy for winning this game with any target?
Connect three
In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?
Crossing the bridge
Four friends must cross a bridge. How can they all cross it in just 17 minutes?