Or search by topic
Count what you see: how many bricks? sectors? circles?
Identify how you think the pattern would continue: how many will be in the next layer/ level?
Look at what would happen if you started (or ended) with a different number of items: how many will there be in total?
Make a cube out of straws and have a go at this practical challenge.
Reasoning about the number of matches needed to build squares that share their sides.
How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?