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: The ratio of three numbers is 1:2:3 and their sum is 60. The second number of the three numbers is?

 Option A: 24

 Option B: 26

 Option C: 20

 Option D: 29

 Option E: 30

A: Option C
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Q: Question: If x, y, and z are positive integers such that x is a factor of y and y is a factor of z, which of the following is NOT necessarily an integer?

 Option A: (x + y

 Option B: (y + z

 Option C: yz/x

 Option D: (2y + 3z

 Option E: (xy + z

A: Option A
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Q: Question: The C.P of 16 books is equal to the S.P of 18 books. Find his gain% or loss%?

 Option A: 11 1/9%

 Option B: 16 2/8%

 Option C: 16 2/5%

 Option D: 16 2/1%

 Option E: 16 1/3%

A:
Option A
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