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

[EX Q]: Problem: the length of a rectangle is increased by 15 % and its breadth is decreased by 20 % . what is the effect on its area ?
[EX A]: 920

[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: 5 , 11 , 23 , 41 , 64 , _
[EX A]:
95