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.

[Q]: Question: A mall charges 50 cents for the first hour of parking and $4 for each additional hour until the customer reaches 4 hours, after that the parking fee is $2 per hour. If a Rahul parked his car in the mall for 7 hours and 30 minutes, how much is he going to pay?

 Option A: $25

 Option B: $12.

 Option C: $23.5

 Option D: $24.5.

 Option E: $25.5
[A]: Option A


[Q]: Question: If 5 ministers are to be seated at a round table conference, then how many different ways can they be seated?

 Option A: 240

 Option B: 60

 Option C: 24

 Option D: 720

 Option E: 180
[A]: Option C


[Q]: Question: Which one of the following can't be the square of natural number ?

 Option A: 465456

 Option B: 656565

 Option C: 521213

 Option D: 143642

 Option E: 643212
[A]:
Option D