Stage: 2 Challenge Level: 
The coloured shapes stand for eleven of the numbers from $0$ to $12$. Each shape is a different number.
Can you work out what they are from the multiplications below?
This activity is featured in the hands-on Brain Buster Maths Boxes, developed by members of the NRICH Team and produced by BEAM. For more details see here .
A poster of this problem is available here.
Introducing algebra. Investigations. Addition & subtraction. Working systematically. Combinations. Trial and improvement. Factors and multiples. Interactivities. Multiplication & division. Visualising.
Published July 2007,August 2007.
Copyright © 2007. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project, which also includes the Plus and Motivate sites.
email: nrich@damtp.cam.ac.uk