List

Live Problems - Stage 4 and 5

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.

Fruity Totals
problem
Favourite

Fruity totals

Age
7 to 16
Challenge level
filled star empty star empty star

In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?

crossing the bridge
problem

Crossing the bridge

Age
11 to 18
Challenge level
filled star filled star empty star

Four friends must cross a bridge. How can they all cross it in just 17 minutes?

Connect Three
problem
Favourite

Connect three

Age
11 to 16
Challenge level
filled star filled star empty star

In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?