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: In a local school district, the high school and middle school each received r dollars toward funding for the student arts program. The high school enrolled 600 students and the middle school enrolled 300 students. Later, the middle school transferred s dollars to the high school so that they would have received the same funding per student. Which of the following is equivalent to s?

 Option A: r/3

 Option B: r/2

 Option C: 2r

 Option D: 3r

 Option E: r/9

A: Option A
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Q: Question: A car going at 40 miles per hour set out on an 90-mile trip at 9:00 A.M. Exactly 10 minutes later, a second car left from the same place and followed the same route. How fast, in miles per hour, was the second car going if it caught up with the first car at 10:30 A.M.?

 Option A:  45

 Option B:  50

 Option C:  53

 Option D:  55

 Option E:  90

A: Option E
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Q: Question: If the LCM of two integers c, d (where d> c and c>1) is c*d, then which of the following can not be true?

 Option A: Both c and d can be consecutive integers.

 Option B: Both c and d can be Prime Numbers.

 Option C: All Prime factors of c must be Prime factors of d.

 Option D: c and d do not have a common factor.

 Option E: c and d do not share any Prime factors.

A:
Option C
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