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Carton problem

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by gmat009 » Tue Oct 07, 2008 9:18 pm
A certain carton holds fewer than 50 books. What is the number of books in the carton?
(1) The books in the carton can be divided into 3 stacks of X books each, with 2 books left over.
(2) The books in the carton can be divided into Y stacks of 7 books each, with 2 books left over.
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Source: — Data Sufficiency |
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by loki.gmat » Tue Oct 07, 2008 9:42 pm
let n be the number of books in the carton.

stat1 - n can be 5,8,11,14,17,20,23,..................44 or 47.not sufficient.

stat2 - n can be 9,16,23,30,37 or 44. not sufficient.

stat1&2 - n can be 23 or 44.not sufficient.

hence IMO E.


Thanks!
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my take on this..

by vini vidi vici » Tue Oct 07, 2008 9:48 pm
E.

fact A gives us one max value and numerous minimum values (insufficient) : Discard AD
fact B gives us one max value and nummerous minimum values (insufficient): Discard B
both facts put together can give us different maximum and minimum values less than 50 e.g. 23 and 44. : Discard C
We're left with E as the only choice.
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by vini vidi vici » Tue Oct 07, 2008 9:52 pm
lol loki i was drafting my post before i noticed urs when i submitted mine.
i think it is E afterall
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