Copyright © University of Cambridge. All rights reserved.

'Making Trains' printed from http://nrich.maths.org/

Show menu


Laura made a train with the Cuisenaire rods.
Her train was made from three rods which were all different colours.
It was the same length as three pink rods:

three pink rods

Laura's train looked like this:

black, red and green rods

Can you make a different train, the same length as Laura's, with three rods which are all different colours?

Can you make one the same length using no colours that Laura used?

Rob made a train that was the same length as Laura's using four differently coloured rods.
How did he do it?

Charlene made a train which was as short as it could be using four differently coloured rods. Can you find a rod that is the same length as Charlene's train?

Ben made a train using four differently coloured rods the same length as two black rods and a light green one:

2 black rods and a light green rod

He made it without using a white rod. How did he do it?

You may like to use this interactivity to try out your ideas. Click on 'Rods' to choose your rods:

Full Screen Version
This text is usually replaced by the Flash movie.