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 15 % of 40 is greater than 25 % of a number by 2 , the number is 
Options: a ) 14 , b ) 16 , c ) 18 , d ) 20 , e ) 22
b

Problem: the cost price of a radio is rs . 1500 and it was sold for rs . 1110 , find the loss % ? 
Options: a ) 18 , b ) 16 , c ) 26 , d ) 17 , e ) 11
c

Problem: a certain sum is invested at simple interest at 18 % p . a . for two years instead of investing at 12 % p . a . for the same time period . therefore the interest received is more by rs . 600 . find the sum ? 
Options: a ) 7000 , b ) 7029 , c ) 2778 , d ) 2800 , e ) 5000

e