Single Elimination Practice - Wasted Games/Number of Entries

See if you guys can give these a shot!

Under the conditions below, find the number of days it will take to conduct a single elimination tournament.  Assume no team is playing more than ONCE per day:

1.  Number of games that can be played per day: 13
    Number of days that are available: 25

2.  Number of games that can be played per day: 4
    Number of days that are available: 10

3.  Number of games that can be played per day: 12
    Number of days that are available:  12

4.  Number of games that can be played per day: 8
    Number of days that are available: 5

5.  Number of games that can be played per day: 16
    Number of days that are available: 7

Here's a word problem:

You did such a good job with the youth ice hockey tournament that the Bulldogs have hired you on their staff as a community services coordinator!  As such, you are responsible for programming an adult ice hockey tournament to achieve the same goals as your youth tournament.  Unfortunately, the Bulldogs are now in training camp, and the facilities that they have made available to you are pretty restricted.  They have allowed you to play 4 games per day for a total of 7 days in their practice facility.  You have a huge interest in the tournament from the adults in the community.  How many teams can you enter into the tournament?