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: company z has 53 employees . if the number of employees having birthdays on wednesday is more than the number of employees having birthdays on any other day of the week , each of which have same number of birth - days , what is the minimum number of employees having birthdays on wednesday . 
Options: a ) 6 , b ) 7 , c ) 8 , d ) 11 , e ) 12
d

Problem: a rower whose speed is 2.5 km / hr in still water rows to a certain point upstream and back to the starting point in a river which flows at 0.5 km / hr . what is the rower ' s average speed ( in km / hr ) for the total journey ? 
Options: a ) 2.2 , b ) 2.3 , c ) 2.4 , d ) 2.5 , e ) 2.6
c

Problem: david is 12 years older than his daughter rosy . in 4 years david will be twice as old as rosy . what is rosy current age . 
Options: a ) 9 , b ) 10 , c ) 11 , d ) 8 , e ) 12

d