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: a sum of money at simple interest amounts to rs . 415 in 2 years and to rs . 514 in 4 years . the sum is ?
Options: a ) rs . 316 , b ) rs . 251 , c ) rs . 154 , d ) rs . 294 , e ) rs . 200

SOLUTION: a

PROBLEM: Problem: solve the quickfire maths brain teaser a s 25 % = ?
Options: a ) 30 % , b ) 40 % , c ) 50 % , d ) 19 % , e ) 29 %

SOLUTION: c

PROBLEM: Problem: john and david can finish a job together in 1 hours . if john can do the job by himself in 2 hours , what percent of the job does david do ?
Options: a ) 40 % , b ) 45 % , c ) 50 % , d ) 55 % , e ) 60 %

SOLUTION:
c