In this task, you need to provide the correct option for a given problem from the provided options.

[EX Q]: Problem: if p and q are both odd prime numbers andp < q , then how many different positive integer factors does 2 pqhave ? 
Options: a ) 3 , b ) 4 , c ) 6 , d ) 8 , e ) 12
[EX A]: d

[EX Q]: Problem: in a group of 650 readers who read science fiction or literacy works or both , 250 read science fiction and 550 read literacy works . how many read both science fiction and literacy works ? 
Options: a ) 650 , b ) 250 , c ) 150 , d ) 100 , e ) 400
[EX A]: c

[EX Q]: Problem: the sum of the numbers is 177 . if the ratio between the first and the second be 5 : 3 and that between the second and third be 4 : 9 , then find the second number ? 
Options: a ) 12 , b ) 20 , c ) 45 , d ) 60 , e ) 52
[EX A]:
c