In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: the average ( arithmetic mean ) of 4 positive integers is 30 . if the average of 2 of these integers is 15 , what is the greatest possible value that one of the other 2 integers can have ? 
Options: a ) 55 , b ) 89 , c ) 100 , d ) 109 , e ) 115
[EX A]: b

[EX Q]: Problem: if x is 20 percent more than y and y is 60 percent less than z , then x is what percent of z ? 
Options: a ) 500 % , b ) 48 % , c ) 500 / 3 % , d ) 125 % , e ) 60 %
[EX A]: b

[EX Q]: Problem: the average of 13 numbers is 60 . average of the first 7 of them is 56 and that of the last 7 is 61 . find the 8 th number ? 
Options: a ) 39 , b ) 83 , c ) 45 , d ) 53 , e ) 64
[EX A]:
a