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any simpler way..

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by force5 » Thu Apr 28, 2011 12:06 am
11/50 is approx 0.22
at least twice greater should be more than 0.44

only 9/20 is more than 0.44 hence should be the answer.
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by Stuart@KaplanGMAT » Thu Apr 28, 2011 10:53 am
alltimeacheiver wrote:Which of the following fractions is at least twice greater than 11/50?
2/5
11/34
43/99
8/21
9/20
While this question would never appear on the GMAT ("at least twice greater than" makes no sense - clearly the author meant to say "at least twice as much as"), it illustrates an interesting strategic approach.

Let's start with a fundamental rule of the exam: there can only be 1 correct answer to each question.

Next, let's look at the question: it's asking for an answer that's greater than a certain number.

Well, since there can only be 1 correct answer, and since we want an answer greater than a certain number, the answer must be the biggest number among the choices; after all, if the second biggest number were big enough, then the biggest number would also be big enough, leaving us with two correct choices!

So, just determine which answer has the greatest value and you're done.
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