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: A table is bought for Rs.400/- and sold at Rs.600/- find gain or loss percentage

 Option A: 15%loss

 Option B: 10%gain

 Option C: 30%gain

 Option D: 20%loss

 Option E: 50% gain
[EX A]: Option E

[EX Q]: Question: A certain basketball team played seven games and scored an average of 50 points per game. If, in the team’s first five games, it scored 45, 39, 61, 50, and 43 points, what was the average (arithmetic mean) number of points scored over the last two games?

 Option A: 65

 Option B: 81

 Option C: 82

 Option D: 56

 Option E: Cannot be determined from the information given.
[EX A]: Option D

[EX Q]: Question: On Charlie's cell phone plan, he signed up for 8GB of data per 4 week period. If he went over the 8GB per month, it would cost him an extra $10 per GB.
In the first week, he used 2 GB; in the 2nd week, he used 3 GB; in the 3rd week, he used 5 GB; and in the 4th week, he used a whopping 10GB.
How much extra did Charlie need to pay on his cell phone bill?

 Option A: $120

 Option B: $40

 Option C: $80

 Option D: $100

 Option E: $140
[EX A]:
Option A