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

Problem: if the cost price of 50 articles is equal to the selling price of 40 articles , then the gain or loss percent is ?
25 %

Problem: a rectangular plot measuring 90 metres by 50 metres is to be enclosed by wire fencing . if the poles of the fence are kept 10 metres apart , how many poles will be needed ?
28

Problem: the difference between the place values of two eights in the numerical 38140482 is
7999920