In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: an error 10 % in excess is made while measuring the side of a square . now what is the percentage of error in the calculated area of the square ? 
Options: a ) 6.64 % , b ) 16.64 % , c ) 15.64 % , d ) 21 % , e ) 10.64 %
[EX A]: d

[EX Q]: Problem: what is the value of â ˆ š 25 % ? 
Options: a ) 10 % , b ) 50 % , c ) 25 % , d ) 45 % , e ) 68 %
[EX A]: b

[EX Q]: Problem: a man bought 40 shares of rs . 60 at 8 discount , the rate of dividend being 1212 % the rate of interest obtained is 
Options: a ) 13.64 % , b ) 15.5 % , c ) 14 % , d ) 14.42 % , e ) 14.95 %
[EX A]:
d