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Re: Which of the following fractions is at least twice greater t [#permalink]

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04 Apr 2013, 18:04

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The fastest way to solve this problem is to use POE and approx by making the denominator same

A) 2/ 5 = 20/50 numerator is less than 22 so out. B) 11/34 = 550 / 170 numerator is less than 746 so out. C) 43 / 99 = approx. 43 / 100 numerator is much less than 80 so out. D. 8/21 = approx. 40 / 100 close to C so out.. E. 9/20 = 45 / 100 numerator is more than twice 22 so Answer is E

//Kudos please, if the above explanation is good.
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Re: Which of the following fractions is at least twice greater t [#permalink]

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04 Apr 2013, 21:47

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Tagger wrote:

Which of the following fractions is at least twice greater than 11/50?

A. 2/5 B. 11/34 C. 43/99 D. 8/21 E. 9/20

It looks very easy but what is the fastest way to solve it ?

11/50 -->0.22. Now, we want to look at a value which is atleast 0.44 or more.

A-->0.4 B-->11/34 == 11/33(As we decreased the denominator, the actual value will be a little less) than 0.33 C-->43/99== 44/99(the actual value will be a little less) than 0.44 D-->8/21==8/20(the actual value will be a little less) than 0.4 E-->9/20==8/20(the actual value will be a little more) =0.45

Re: Which of the following fractions is at least twice greater t [#permalink]

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14 Jan 2015, 02:33

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Re: Which of the following fractions is at least twice greater t [#permalink]

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19 Mar 2016, 05:39

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Which of the following fractions is at least twice greater than 11/50?

A. 2/5 B. 11/34 C. 43/99 D. 8/21 E. 9/20

It looks very easy but what is the fastest way to solve it ?

Hi,

I believe any choice given by GMAT invariably does not require too much of calculations BUT we should how to read the info provided by choices..

so first lets see the Q--

atleast twice greater than 11/50..

INFERENCE-

1) Only ONE choice will be > 2*11/50.. 2) In a way we are also looking for the LARGEST number in choice 3) The above 2-point mean that we can eliminate choices by comparing with 22/50 and ALSO by comparing within each other..

lets see the choices-

A. 2/5 .. 2/5 = 4/20 < E. 9/20..... also 2/5=20/50 <22/50.. eliminate B. 11/34 .. 11/34 = 22/68.. numerators are same but denominator>50 so <22/50.. eliminate C. 43/99 .. 22/50 = 44/100... In the choice both numerator and denominator are less by one each so 43/99<44/100.. eliminate D. 8/21 .. clearly 8/21<E.9/20.. eliminate E. 9/20 .. Only one left 9/20 = 45/100 > 44/100.. ANSWER

Re: Which of the following fractions is at least twice greater t [#permalink]

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22 Jul 2017, 11:14

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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