problem Circles, Circles Age 5 to 11 Challenge level Here are some arrangements of circles. How many circles would I need to make the next size up for each? Can you create your own arrangement and investigate the number of circles it needs?
problem Build it up Age 7 to 11 Challenge level Can you find all the ways to get 15 at the top of this triangle of numbers? Many opportunities to work in different ways.
list Generalising Age 5 to 11 These tasks give learners chance to generalise, which involves identifying an underlying structure.