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: 5 % people of a village in sri lanka died by bombardment , 15 % of the remainder left the village on account of fear . if now the population is reduced to 3294 , how much was it in the beginning ? 
Options: a ) 2988 , b ) 2776 , c ) 4079 , d ) 2871 , e ) 881
[EX A]: c

[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: what is the unit digit of ( 6 ! * 6 ! / 6 ! * 3 ! ) ? 
Options: a ) 0 , b ) 1 , c ) 2 , d ) 3 , e ) 4
[EX A]:
a