There 3 kinds of books in the library physics, chemistry and biology. Ratio of physics to chemistry is 3 to 2; ratio of chemistry to biology is 4 to 3, and the total of the books is more than 3000. Which one of following can be the total Q of the book?
Answers:
A) 3003
B) 3027
C) 3024
D) 3021
E) 3018
First, you have to find the common ratio for all 3 books. You have:   P:C:B   3:2 --&gt; multiply by 2 (gives you row 3)   4:6   6:4:3   Hence:   P:C:B:T(Total)=Q   6:4:3:13 ----&gt; This means, the Total Number must be a multiple of 13.   3003nswer 3003 is correct since 299 is divisible by 13, hence is 2990 and so is 3003 (2990+13).
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There 3 kinds of books in the library physics, chemistry and biology. Ratio of physics to chemistry is 3 to 2; ratio of chemistry to biology is 4 to 3, and the total of the books is more than 3000. Which one of following can be the total Q of the book?