
problem
Little squares
Look at the squares in this problem. What does the next square look
like? I draw a square with 81 little squares inside it. How long
and how wide is my square?
Arrange the shapes in a line so that you change either colour or shape in the next piece along. Can you find several ways to start with a blue triangle and end with a red circle?
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?