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

[Q]: Problem: if a = 105 and a ^ 3 = 21 25 45 z , what is the value of z ?
[A]: 49

[Q]: Problem: if 5 % more is gained by selling an article for rs . 360 than by selling it for rs . 340 , the cost of the article is ?
[A]: 400

[Q]: Problem: in a group of 150 readers who read science fiction or literacy works or both , 120 read science fiction and 90 read literacy works . how many read both science fiction and literacy works ?
[A]:
60