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 sum of all the integers k such that – 25 < k < 24 is 
Options: a ) 0 , b ) - 2 , c ) - 25 , d ) - 49 , e ) - 47
[EX A]: e

[EX Q]: Problem: if the remainder is 15 when the integer n is divided by 28 , what is the remainder when 2 n is divided by 14 ? 
Options: a ) 0 , b ) 1 , c ) 2 , d ) 3 , e ) 4
[EX A]: c

[EX Q]: Problem: if - 3 x + 5 y = 48 and 3 x - 2 y = 6 , what is the product of x and y ? 
Options: a ) 252 , b ) 428 , c ) 464 . , d ) 200 , e ) 642
[EX A]:
a