In this town, houses are built with one room for each person. There are some families of seven people living in the town. In how many different ways can they build their houses?
Age 5 to 7 Challenge Level
Here is another triangular shape made from arranging circles.
Move just three of the circles so that the triangle faces in the opposite direction.
You could use this interactivity to try out your ideas:
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.