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'.

[Q]: Problem: find value for x from below equation ? x + 1 = 4 
Options: a ) - 5 , b ) - 4 , c ) 4 , d ) 3 , e ) 2
[A]: d


[Q]: Problem: there are 3 departments having students 72 , 5824 . in an exam they have to be seated in rooms such that each room has equal number of students and each room has students of one type only ( no mixing of departments ) . find the minimum number of rooms required ? 
Options: a ) 73 , b ) 74 , c ) 75 , d ) 76 , e ) 77
[A]: e


[Q]: Problem: if a ( a + 2 ) = 80 and b ( b + 2 ) = 80 , where a ≠ b , then a + b = 
Options: a ) - 3 , b ) - 4 , c ) - 6 , d ) - 8 , e ) - 2
[A]:
e