The task is to generate the correct answer for a given math problem.
--------
Question: Problem: if p / q = 3 / 11 , then 2 p + q = ?

Answer: 17


Question: Problem: a tyre has two punctures . the first puncture alone would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes . if air leaks out at a constant rate , how long does it take both the punctures together to make it flat ?

Answer: 335 min


Question: Problem: how many multiples of 3 are there between 10 and 100 , exclusive ?

Answer:
30