In this feature, you can see how some children started each task. This isn't because we want to give away the solutions though! Instead we think you will find it helpful to try each task on your own or with a partner first, and then we encourage you to take a look at the other children's starting points.
Can you work out their method? Can you continue it to a full solution? Next time you see a task like that one, how might you go about solving it? Why have you chosen that way to do it?
Nine squares with side lengths 1, 4, 7, 8, 9, 10, 14, 15, and 18 cm can be fitted together to form a rectangle. What are the dimensions of the rectangle?