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

Problem: how many of the positive factors of 17 are not factors of 34 ? 
Options: a ) 0 , b ) 1 , c ) 2 , d ) 3 , e ) 4
a

Problem: the h . c . f . of two numbers is 10 and the other two factors of their l . c . m . are 13 and 14 . the larger of the two numbers is : 
Options: a ) 100 , b ) 120 , c ) 180 , d ) 140 , e ) 60
d

Problem: in a corporation , 50 percent of the male employees and 40 percent of the female employees are at least 35 years old . if 42 percent of all the employees are at least 35 years old , what fraction of the employees in the corporation are females ? 
Options: a ) 3 / 5 , b ) 2 / 3 , c ) 3 / 4 , d ) 4 / 5 , e ) 5 / 6

d