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

[EX Q]: Problem: the sum of the even numbers between 1 and n is 89 * 90 , where n is an odd number , then n = ?
[EX A]: 179

[EX Q]: Problem: a cistern is normally filled in 6 hours but takes two hours longer to fill because of a leak in its bottom . if the cistern is full , the leak will empty it in ?
[EX A]: 24

[EX Q]: Problem: one pipe can fill a tank three times as fast as another pipe . if together the two pipes can fill the tank in 34 minutes , then the slower pipe alone will be able to fill the tank in
[EX A]:
136 mins