TASK DEFINITION: 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: Problem: solve the quickfire maths brain teaser â ˆ š 25 % = ? 
Options: a ) 30 % , b ) 40 % , c ) 50 % , d ) 19 % , e ) 29 %

SOLUTION: c

PROBLEM: Problem: an escalator moves towards the top level at the rate of 12 ft . sec and its length is 160 feet . if a person walks on the moving escalator at the rate of 8 feet per second towards the top level , how much time does he take to cover the entire length . 
Options: a ) 10 sec , b ) 8 sec , c ) 9 sec , d ) 7 sec , e ) 12 sec

SOLUTION: b

PROBLEM: Problem: a sum of money at simple interest amounts to rs . 835 in 3 years and to rs . 854 in 4 years . the sum is : 
Options: a ) 647 , b ) 698 , c ) 778 , d ) 847 , e ) 976

SOLUTION:
c