1. The World Series of Baseball is played between the American League and National League champions, in which each league consists of 15 teams. How many different possible matchups are there for the World Series?
2. The Super Bowl is a game played between the National Football Conference and American Football Conference champions. Each conference consists of 16 teams. How many different possible matchups are there for the Super Bowl?
3. There are 3200 duplicate bridge clubs sanctioned by the American Contract Bridge Association. If each club holds two games per week and each duplicate game consists of 24 deals, how many deals are played in club games each year?
4. An ice cream parlor offers 25 flavors of ice cream. Assuming that order matters, how many different two-scoop cones can be made? What if no flavor can be repeated?