The task is to generate the correct answer for a given math problem.

[Q]: Problem: you collect baseball cards . suppose you start out with 15 . maria takes half of one more than the number of baseball cards you have . since you ' re nice , you give peter 1 baseball card . since his father makes baseball cards , paul decides to triple your baseball cards . how many baseball cards do you have at the end ?
[A]: 18


[Q]: Problem: pipe a can fill a tank in 6 hours . due to a leak at the bottom , it takes 10 hours for the pipe a to fill the tank . in what time can the leak alone empty the full tank ?
[A]: 15


[Q]: Problem: how many integers are between 7 and 57 / 4 , inclusive ?
[A]:
8