GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 11 Dec 2018, 21:31

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

## Events & Promotions

###### Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• ### Free GMAT Prep Hour

December 11, 2018

December 11, 2018

09:00 PM EST

10:00 PM EST

Strategies and techniques for approaching featured GMAT topics. December 11 at 9 PM EST.
• ### The winning strategy for 700+ on the GMAT

December 13, 2018

December 13, 2018

08:00 AM PST

09:00 AM PST

What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.

# Which of the following fractions is at least twice greater t

Author Message
TAGS:

### Hide Tags

Intern
Joined: 01 Apr 2013
Posts: 21
Which of the following fractions is at least twice greater t  [#permalink]

### Show Tags

04 Apr 2013, 16:09
2
4
00:00

Difficulty:

35% (medium)

Question Stats:

64% (01:27) correct 36% (01:29) wrong based on 379 sessions

### HideShow timer Statistics

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 ?

_________________

Manager
Status: Looking to improve
Joined: 15 Jan 2013
Posts: 152
GMAT 1: 530 Q43 V20
GMAT 2: 560 Q42 V25
GMAT 3: 650 Q48 V31
Re: Which of the following fractions is at least twice greater t  [#permalink]

### Show Tags

04 Apr 2013, 17:04
7
1
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.
_________________

KUDOS is a way to say Thank You

##### General Discussion
Manager
Joined: 21 Aug 2010
Posts: 175
Location: United States
GMAT 1: 700 Q49 V35
Re: Which of the following fractions is at least twice greater t  [#permalink]

### Show Tags

04 Apr 2013, 16:31
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
9/20=0.45 which is 0.01 greater than two times of 0.22
_________________

-------------------------------------

Verbal Forum Moderator
Joined: 10 Oct 2012
Posts: 611
Re: Which of the following fractions is at least twice greater t  [#permalink]

### Show Tags

04 Apr 2013, 20:47
4
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

E.
_________________
Intern
Joined: 01 Apr 2013
Posts: 21
Re: Which of the following fractions is at least twice greater t  [#permalink]

### Show Tags

05 Apr 2013, 02:52
Thx fellows !

Since we're not allowed to use calculators, nt2010 method is the fastest I think.
_________________

SVP
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1825
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Re: Which of the following fractions is at least twice greater t  [#permalink]

### Show Tags

14 Jan 2015, 20:31
1

Rationalise the denominator, $$\frac{9}{20} = \frac{45}{100}$$ is the highest
_________________

Kindly press "+1 Kudos" to appreciate

Intern
Joined: 23 Apr 2016
Posts: 7
Re: Which of the following fractions is at least twice greater t  [#permalink]

### Show Tags

27 Apr 2016, 05:26
You can also set them equal to each other, cross multiply, and compare:

A.) 2/5 = 11/50 --> 100 = 55 (more than half)
B.) 11/34 = 11/50 --> 550 = 374 (more than half)
C.) 43/99 = 11/50 --> 2,150 = 1,089 (more than half)
D.) 8/21 = 11/50 --> 400 = 231 (more than half)
E.) 9/20 = 11/50 --> 450 = 220 (less than half)

In problems like this it is fastest to skip the longer ones like B & C and jump to D & E
Math Expert
Joined: 02 Aug 2009
Posts: 7101
Which of the following fractions is at least twice greater t  [#permalink]

### Show Tags

27 Apr 2016, 05:58
1
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 ?

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

E
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

GMAT online Tutor

Non-Human User
Joined: 09 Sep 2013
Posts: 9121
Re: Which of the following fractions is at least twice greater t  [#permalink]

### Show Tags

25 Jul 2018, 08:35
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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: Which of the following fractions is at least twice greater t &nbs [#permalink] 25 Jul 2018, 08:35
Display posts from previous: Sort by