In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Problem: 2.505 / 10.02 = 
Options: a ) 0.35 , b ) 0.3505 , c ) 0.25 , d ) 0.351 , e ) 0.3527
c

Problem: a man is 20 years older than his son . in two years , his age will be twice the age of his son . the present age of the son is ? 
Options: a ) 11 , b ) 25 , c ) 27 , d ) 18 , e ) 91
d

Problem: calculate the share of y , if rs . 2880 is divided among x , y and z in the ratio 3 : 5 : 8 ? 
Options: a ) 540 , b ) 520 , c ) 140 , d ) 560 , e ) 240

a