My coat has three buttons. How many ways can you find to do up all
Stage: 1 Challenge Level:
What is the same?
What is different?
How do you know that you have them all?
If you are working away from the computer, you might like to print off this sheet of equilateral triangles and cut them out.
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. More information on many of our other activities
can be found here.