You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

[EX Q]: Question: Factor (x + 4)3 - 9x - 36 =

 Option A: (x - 4

 Option B: (x + 6

 Option C: (x + 4

 Option D: (x + 4

 Option E: None
[EX A]: Option D

[EX Q]: Question: Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average by 8 runs. His new average is:

 Option A: 20

 Option B: 21

 Option C: 28

 Option D: 32

 Option E: None
[EX A]: Option C

[EX Q]: Question: The length of a rectangular hall is 5m more than its breadth. The area of the hall is 750 m. The length of the hall is?

 Option A: 22

 Option B: 25

 Option C: 27

 Option D: 19

 Option E: 12
[EX A]:
Option B