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'.

[Q]: Problem: what sum of money will produce rs . 70 as simple interest in 4 years at 4 1 / 2 percent ? 
Options: a ) 263 , b ) 500 , c ) 388.9 , d ) 368 , e ) 339
[A]: c


[Q]: Problem: machine p and machine q are each used to manufacture 660 sprockets . it takes machine p 10 hours longer to produce 660 sprockets than machine q . machine q produces 10 % more sprockets per hour than machine a . how many sprockets per hour does machine a produce ? 
Options: a ) 5 , b ) 15 , c ) 55 , d ) 95 , e ) 6
[A]: e


[Q]: Problem: peter invested a certain sum of money in a simple interest bond whose value grew to $ 300 at the end of 3 years and further to $ 400 at the end of another 5 years . what was the rate of interest in which he invested his sum ? 
Options: a ) 12 % , b ) 12.5 % , c ) 6.67 % , d ) 6.25 % , e ) 8.33 %
[A]:
e