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: what is the value of 8 1 / 3 % of 600 + 37 ½ of 400 
Options: a ) 100 , b ) 300 , c ) 150 , d ) 200 , e ) 250
[EX A]: d

[EX Q]: Problem: the contents of a certain box consist of 48 apples and 30 kiwis . how many kiwis must be added to the box so that exactly 30 % of the pieces of fruit in the box will be apples ? 
Options: a ) 90 , b ) 72 , c ) 82 , d ) 54 , e ) 65
[EX A]: c

[EX Q]: Problem: if 3 ^ x * 4 ^ y = 1 , 594,323 and x – y = 13 , then x = ? 
Options: a ) 10 , b ) 11 , c ) 12 , d ) 13 , e ) 14
[EX A]:
d