One, two, three.

...the Triwizard Tournament brings together three schools...

Now, what would three young Gryffindors such as yourselves...

But to do this, that student must survive three tasks.

Who knows? Why was he trying to get past that three-headed dog on Halloween?

How often do you come across a three-headed dog, even if you're in the trade?

Now, the Chasers handle the Quaffle and try to put it through one of those three hoops.