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: a dishonest dealer claims to sell a product at its cost price . he uses a counterfeit weight which is 20 % less than the real weight . further greed overtook him and he added 15 % impurities to the product . find the net profit percentage of the dealer ? 
Options: a ) 46.85 % , b ) 43.75 % , c ) 50 % , d ) 56.25 % , e ) 36 %
[EX A]: b

[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: 1 = 5,2 = 4,3 = 253,4 = 2,6 = 15 , then 15 = ? 
Options: a ) 1 , b ) 255 , c ) 345 , d ) 445 , e ) 6
[EX A]:
e