Being collaborative

Amy's mum had given her £2.50 to spend. She bought four times as many pens as pencils and was given 40p change. How many of each did she buy?

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.

Can you sort these triangles into three different families and explain how you did it?

Powers of numbers behave in surprising ways. Take a look at some of these and try to explain why they are true.

Can you each work out what shape you have part of on your card? What will the rest of it look like?