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

[Q]: Problem: line q has the equation 5 y – 3 x = 30 . if line s is perpendicular to q , has an integer for its y - intercept , and intersects q in the second quadrant , then how many possible line s ’ s exist ? ( note : intersections on one of the axes do not count . )
[A]: 22


[Q]: Problem: what is the probability of getting a queen or spade from a set of cards ?
[A]: 4 / 13


[Q]: Problem: a is half good a work man as b and together they finish a job in 13 days . in how many days working alone b finish the job ?
[A]:
39 / 2