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: when the positive integer x is divided by 9 , the remainder is 5 . what is the remainder when 5 x is divided by 9 ? 
Options: a ) 0 , b ) 1 , c ) 3 , d ) 4 , e ) 7
[EX A]: e

[EX Q]: Problem: the difference between a 7 digit number and the number formed by reversing its digit is not a multiple of 
Options: a ) 121 , b ) 11 , c ) 9 , d ) 10 , e ) 3
[EX A]: a

[EX Q]: Problem: if x is 20 percent greater than 80 , then x = 
Options: a ) 68 , b ) 70.4 , c ) 96 , d ) 105.6 , e ) 108
[EX A]:
c