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 school. If you'd like to read more about what we're looking for, read this short article.

This set of tasks will stop being live on Monday 3 February. 

Secondary Toughnutslive

Age 11 to 18 Challenge Level:

These secondary problems have not yet been solved. Can you be the first?

Rod Fractionslive

Age 7 to 14 Challenge Level:

Pick two rods of different colours. Given an unlimited supply of rods of each of the two colours, how can we work out what fraction the shorter rod is of the longer one?

Colour Buildinglive

Age 11 to 14 Challenge Level:

Using only the red and white rods, how many different ways are there to make up the other rods?

Combining Lengthslive

Age 11 to 16 Challenge Level:

How many different lengths is it possible to measure with a set of three rods?

Searching for Mean(ing)live

Age 11 to 16 Challenge Level:

If you have a large supply of 3kg and 8kg weights, how many of each would you need for the average (mean) of the weights to be 6kg?

Different by Onelive

Age 14 to 16 Challenge Level:

Can you make lines of Cuisenaire rods that differ by 1?

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.
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