instruction:
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'.
question:
Problem: a number exceeds 20 % of itself by 40 . the number is ? 
Options: a ) 50 , b ) 60 , c ) 80 , d ) 320 , e ) none
answer:
a


question:
Problem: if rs . 420 amount to rs . 540 in 4 years , what will it amount to in 6 years at the same rate % per annum ? 
Options: a ) s . 575 , b ) s . 595 , c ) s . 590 , d ) s . 600 , e ) s . 585
answer:
d


question:
Problem: walking 7 / 6 of his usual rate , a boy reaches his school 2 min early . find his usual time to reach the school ? 
Options: a ) 14 , b ) 28 , c ) 99 , d ) 77 , e ) 66
answer:

a