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'.

Problem: if the simple interest on a certain sum of money for 5 years is one fifth of the sum , then the rate of interest per annum is
Options: a ) 4 % , b ) 7 % , c ) 6 % , d ) 4 % , e ) 3 %
d

Problem: p and q invested in a shop . the profits were divided in the ratio of 5 : 2 respectively . if p invested rs . 5600 , the amount invested by q is :
Options: a ) 3500 , b ) 5600 , c ) 2200 , d ) 2400 , e ) none
e

Problem: what annual payment will discharge a debt of rs . 1025 due in 2 years at the rate of 5 % compound interest ?
Options: a ) rs . 550 , b ) rs . 551.25 , c ) rs . 560 , d ) rs . 560.75 , e ) rs . 660.75
b