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 tax on a commodity is diminished by 32 % but its consumption is increased by 12 % . find the decrease percent in the revenue derived from it ? 
Options: a ) 20 % , b ) 18 % , c ) 15 % , d ) 12 % , e ) 24 %
[EX A]: e

[EX Q]: Problem: the greatest number which on dividing 1657 and 2037 leaves remainders 10 and 7 respectively , is : 
Options: a ) 123 , b ) 1 , c ) 235 , d ) 305 , e ) 505
[EX A]: b

[EX Q]: Problem: a batsman scores 26 runs and increases his average from 14 to 15 . find the runs to be made if he wants top increasing the average to 19 in the same match ? 
Options: a ) 12 , b ) 18 , c ) 25 , d ) 74 , e ) 88
[EX A]:
d