Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 29 May 2017, 21:38

### 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 June
Open Detailed Calendar

# Scientists in Princeton have broken the speed barrier posed

Author Message
Director
Joined: 01 Apr 2008
Posts: 881
Name: Ronak Amin
Schools: IIM Lucknow (IPMX) - Class of 2014
Followers: 30

Kudos [?]: 707 [0], given: 18

Scientists in Princeton have broken the speed barrier posed [#permalink]

### Show Tags

16 Sep 2010, 08:16
00:00

Difficulty:

(N/A)

Question Stats:

11% (00:00) correct 89% (00:31) wrong based on 9 sessions

### HideShow timer Statistics

Scientists in Princeton have broken the speed barrier posed by light AND CAUSED A LIGHT PULSE TO TRAVEL AT MANY TIMES THE SPEED OF LIGHT.
(a) ...
(b) and have caused light pulses to travel at many times the speed of light.
(c) and has caused a light pulse to travel at many times the speed of light
(d) and caused light pulses to travel at many times the speed of light
(e) and have enabled a light pulse to travel at many times the speed of light

[Reveal] Spoiler: OA
Senior Manager
Status: Upset about the verbal score - SC, CR and RC are going to be my friend
Joined: 30 Jun 2010
Posts: 317
Followers: 6

Kudos [?]: 22 [0], given: 6

### Show Tags

16 Sep 2010, 08:35
A

past tense is sufficient to convey the information. this narrows down to a or d. in d, the answer refers to pulses instead of pulse.
_________________

My gmat story
MGMAT1 - 630 Q44V32
MGMAT2 - 650 Q41V38
MGMAT3 - 680 Q44V37
GMATPrep1 - 660 Q49V31
Knewton1 - 550 Q40V27

Manager
Joined: 23 Sep 2009
Posts: 148
Followers: 1

Kudos [?]: 107 [0], given: 37

### Show Tags

16 Sep 2010, 10:38
Hi,
DOn't you think it is more parallel when you have "Scientists have broken.....and have caused" ?

SO I picked B. PLease explain.
_________________

Thanks,
VP

Manager
Status: Mesmerized
Joined: 24 Jan 2010
Posts: 175
Location: UAE, Dubai
Followers: 2

Kudos [?]: 122 [0], given: 12

### Show Tags

16 Sep 2010, 10:58
to tell you the truth I cant see any difference between A B D except for the singular and plural in ( Pulse/Pulses), I have never faced a GMAT question where the split falls into just this.
Can you tell us the source of this question?, because I really doubt that on the GMAT this will be the only split, there is always other errors where we can sink our teeth into and reach the right answer.
_________________

Nanquam Fractum

Senior Manager
Joined: 18 Feb 2008
Posts: 497
Location: Kolkata
Followers: 5

Kudos [?]: 117 [0], given: 66

### Show Tags

16 Sep 2010, 11:21
Manager
Status: Mesmerized
Joined: 24 Jan 2010
Posts: 175
Location: UAE, Dubai
Followers: 2

Kudos [?]: 122 [0], given: 12

### Show Tags

17 Sep 2010, 09:32
Dreamy wrote:
A

past tense is sufficient to convey the information. this narrows down to a or d. in d, the answer refers to pulses instead of pulse.

actually in A the verb is not past tense, it is present perfect, it's just that HAVE is omitted otherwise the sentence would not be parallel and wrong.
_________________

Nanquam Fractum

Re: Scientists   [#permalink] 17 Sep 2010, 09:32
Similar topics Replies Last post
Similar
Topics:
Scientists have recently discovered 0 07 May 2012, 17:55
Scientists have recently discovered what... 0 26 Sep 2012, 12:16
Scientists have recently discovered that the ultrathin, 10 13 Nov 2008, 08:41
Having broken with Freud, Jung's later writings nevertheless 1 07 Jun 2007, 06:37
Scientists have recently discovered what could be the 0 24 Sep 2008, 06:01
Display posts from previous: Sort by