TASK DEFINITION: In this task, you need to provide the correct option for a given problem from the provided options.
PROBLEM: Problem: in the third grade of windblown school there are 90 students , one third of them failed the math test and 1 / 6 failed that literature test . at least how many students failed both tests ? 
Options: a ) 0 . , b ) 6 . , c ) 8 . , d ) 10 . , e ) 12 .

SOLUTION: a

PROBLEM: Problem: if m = 3 ^ n , what is the greatest value of n for which m is a factor of 16 ! 
Options: a ) 8 , b ) 10 , c ) 6 , d ) 14 , e ) 16

SOLUTION: c

PROBLEM: Problem: the ratio of two quantities is 3 to 4 . if each of the quantities is increased 4 and 3 respectively , what is the ratio of these two new quantities ? 
Options: a ) 3 / 4 , b ) 8 / 9 , c ) 18 / 19 , d ) 23 / 24 , e ) it can not be determined from the information given

SOLUTION:
e