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'.

[EX Q]: Problem: two numbers are less than a third number by 40 % and 47 % respectively . how much per cent is the second number less than the first ? 
Options: a ) 95 % , b ) 88 % , c ) 85 % , d ) 90 % , e ) none of these
[EX A]: b

[EX Q]: Problem: caleb spends $ 64.50 on 50 hamburgers for the marching band . if single burgers cost $ 1.00 each and double burgers cost $ 1.50 each , how many double burgers did he buy ? 
Options: a ) 29 , b ) 10 , c ) 20 , d ) 40 , e ) 45
[EX A]: a

[EX Q]: Problem: the jogging track in a sports complex is 1000 meters in circumference . deepak and his wife start from the same point and walk in opposite directions at 20 km / hr and 17 km / hr respectively . they will meet for the first time in ? 
Options: a ) 50 min , b ) 40 min , c ) 35 min , d ) 37 min , e ) 20 min
[EX A]:
d