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 least no . must be subtracted from 50248 so that remaining no . is divisible by 20 ? 
Options: a ) 3 , b ) 2 , c ) 4 , d ) 8 , e ) 6
[EX A]: d

[EX Q]: Problem: a store reported total sales of $ 460 million for february of this year . if the total sales for the same month last year was $ 320 million , approximately what was the percent increase in sales ? 
Options: a ) 2 % , b ) 17 % , c ) 44 % , d ) 65 % , e ) 83 %
[EX A]: c

[EX Q]: Problem: the ages of two persons differ by 24 years . if 5 years ago , the elder one be 5 times as old as the younger one , their present ages ( in years ) are respectively 
Options: a ) 20,20 , b ) 20,10 , c ) 25,15 , d ) 35,11 , e ) none of these
[EX A]:
d