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: if 25 % of x is 30 less than 20 % of 1000 , then x is ?
Options: a ) 188 , b ) 216 , c ) 156 , d ) 680 , e ) 121
[EX A]: d

[EX Q]: Problem: 16.02 a 0.01 = ?
Options: a ) 0.1602 , b ) 0.001602 , c ) 1.6021 , d ) 0.01602 , e ) none of these
[EX A]: a

[EX Q]: Problem: what is 10 - 8 + 6 - 4 + . . . + ( - 14 ) ?
Options: a ) 8 , b ) 10 , c ) 12 , d ) 14 , e ) - 2
[EX A]:
e