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

[EX Q]: Problem: if a 1 mm thick paper is folded so that the area is halved at every fold , then what would be the thickness of the pile after 50 folds ?
[EX A]: 1 billion km', 'e ) none'

[EX Q]: Problem: what is the greatest prime factor of 2 ^ 10 - 1 ?
[EX A]: 3

[EX Q]: Problem: evaluate combination 98 c 96 = 98 ! / ( 96 ) ! ( 2 ) !
[EX A]:
4753