Being curious

How can you change the surface area of a cuboid but keep its volume the same? How can you change the volume but keep the surface area the same?

Alison and Charlie are playing a game. Charlie wants to go first so Alison lets him. Was that such a good idea?

Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...

How well can you estimate 10 seconds? Investigate with our timing tool.

Just because a problem is impossible doesn't mean it's difficult...

Play around with sets of five numbers and see what you can discover about different types of average...

Where should you start, if you want to finish back where you started?

Play around with the Fibonacci sequence and discover some surprising results!

The farmers want to redraw their field boundary but keep the area the same. Can you advise them?

Imagine we have four bags containing numbers from a sequence. What numbers can we make now?