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

[Q]: Problem: find the least number must be subtracted from 62575 so that remaining number is divisible by 99 .
[A]: 7

[Q]: Problem: by selling an article for $ 225 a person gains $ 75 . what is the gain % ?
[A]: 50 %

[Q]: Problem: how many seconds will a train 140 meters long take to cross a bridge 150 meters long if the speed of the train is 36 kmph ?
[A]:
29 sec