Maths stuff: Score!!!

This is a maths problem that I solved it is called score!!! In our classroom we've been learning to do maths problem solving stuff. This is just one of them plus it is my favourite so far. It gets you to think how to do it. Especially the third one it sort of tricked me up! It was pretty easy to do for me because I had the knowledge the basic fact and ways to add to the number. Easy as PI!! :D.