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

[EX Q]: Problem: the curved surface of a sphere is 64 π cm 2 . find its radius ?
[EX A]: 4', 'd ) 9', 'e ) 7'

[EX Q]: Problem: find ( 7 x + 2 y ) / ( x - 2 y ) if x / 2 y = 3 / 2 ?
[EX A]: 23

[EX Q]: Problem: the ratio of two numbers is 2 / 3 , and if a 1 is subtracted from the numerator and a 1 is added to the remainder the ratio becomes 1 / 2 , then the numbers are .
[EX A]:
6 and 9