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

 It is currently 19 Jun 2018, 01:43

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

Researchers have announced that the magnetic fields emitted

Author Message
Manager
Joined: 22 Jun 2008
Posts: 104
Schools: Darden School of Business (Class of 2012)
Researchers have announced that the magnetic fields emitted [#permalink]

Show Tags

16 Apr 2009, 10:02
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 3 sessions

HideShow timer Statistics

Researchers have announced that the magnetic fields emitted by one manufacturer’s
security surveillance system, of which type there are 200,000 worldwide, can interfere
with pacemakers and that
this interaction can bring on missed or irregular heartbeats,
nausea, breathlessness, dizziness, and even fainting.

A. of which type there are 200,000 worldwide, can interfere with pacemakers and
that
B. of which, worldwide, there are 200,000 of that type, and which can interfere with
pacemakers, and
C. of which type there are 200,000 worldwide, they can interfere with pacemakers
and
D. 200,000 of which type exist worldwide, interfering with pacemakers, and
E. 200,000 of that type existing worldwide and can interfere with pacemakers, and

OA is D. Some guru who can explain why D is ok and why the others are wrong? Tksvm

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Senior Manager
Joined: 26 Mar 2008
Posts: 298
Location: Washington DC

Show Tags

16 Apr 2009, 11:25
I am sure that OA would be between D or E. But why D?? I can’t really explain however, I can tell the difference between D and E. E says systems existing currently and can interfere with pacemakers anytime.
D says systems exist at present, and are interfering with pacemakers continuously.
I know my reasons are not very subtle here, but that is the best I can think of. I would appreciate if anyone can explain further.
Manager
Joined: 19 Aug 2006
Posts: 226

Show Tags

16 Apr 2009, 18:40
Very, very, extremely interesting. IMO, D is clearly wrong, because the verb 'to interfere' cannot be in present continuous form here.

Could you please post the source of this?
Manager
Joined: 30 Mar 2009
Posts: 233

Show Tags

16 Apr 2009, 21:52
1
In my opinion:

Researchers have announced that the magnetic fields emitted by one manufacturer’s
security surveillance system, of which type there are 200,000 worldwide, can interfere
with pacemakers and that
this interaction can bring on missed or irregular heartbeats,
nausea, breathlessness, dizziness, and even fainting.

A. of which type there are 200,000 worldwide, can interfere with pacemakers and
that --> there are stands behind of which type, sounding ungrammatical
B. of which, worldwide, there are 200,000 of that type, and which can interfere with
pacemakers, and -->same error as (A), besides, type and which are seperated make the choice more incorrectly
C. of which type there are 200,000 worldwide, they can interfere with pacemakers
and --> same error as (A), also the first main clause is not completed when it is intefered by a new clause from "they ... pacemakers"
D. 200,000 of which type exist worldwide, interfering with pacemakers, and --> the first main clause is clearly completed: "the magnetic fields ... exist worldwide", then stands the sub-clause modifying for the first main clause: "interferring ... pacemakers" and finally the second main clause "this interaction... fainting" --> the best
E. 200,000 of that type existing worldwide and can interfere with pacemakers, and --> while that can be as good as which in (D) to clearly modify for surveillance system, the first main clause is not correctly constructed because there is no main verb for this clause: as if it were existing, it would be ungrammatical; as if it were can interfere, why did a conjuntion like and stand before such a main verb --> thus, this choice is incorrect
Manager
Joined: 22 Jun 2008
Posts: 104
Schools: Darden School of Business (Class of 2012)

Show Tags

17 Apr 2009, 06:03
peraspera wrote:
Very, very, extremely interesting. IMO, D is clearly wrong, because the verb 'to interfere' cannot be in present continuous form here.

Could you please post the source of this?

OA is D. Found it in the web
Manager
Joined: 19 Aug 2006
Posts: 226

Show Tags

17 Apr 2009, 07:03
lordw wrote:
peraspera wrote:
Very, very, extremely interesting. IMO, D is clearly wrong, because the verb 'to interfere' cannot be in present continuous form here.

Could you please post the source of this?

OA is D. Found it in the web

Well, IMO the source is wrong, it cannot be D, as D clearly has grammar mistakes.
I think it's A because A is 1) grammatically correct 2) concise and 3) correctly uses the parallel construction 'that...that...'.

Could you prove that either A is wrong, or D is correct, with explanation?
Manager
Joined: 22 Feb 2009
Posts: 129
Schools: Kellogg (R1 Dinged),Cornell (R2), Emory(Interview Scheduled), IESE (R1 Interviewed), ISB (Interviewed), LBS (R2), Vanderbilt (R3 Interviewed)

Show Tags

17 Apr 2009, 10:58
D. Cannt explain though. Seems to the the best of the lot
Director
Joined: 23 May 2008
Posts: 743

Show Tags

27 Apr 2009, 11:52
yup..would have picked A on test
Director
Joined: 27 Jun 2008
Posts: 509
WE 1: Investment Banking - 6yrs

Show Tags

27 Apr 2009, 12:01
What about "that" in A, isn't it an error?

D - 200,000 of which modifies "security surveillance system"
Manager
Joined: 05 Apr 2007
Posts: 234

Show Tags

06 May 2009, 09:35
Friends,
It will be wrong to use "interfering" here as used in D..Whats the source of the OA???Of the ones left, A is the one that does not has the modifier error...My pick will be A...........

lordw wrote:
Researchers have announced that the magnetic fields emitted by one manufacturer’s
security surveillance system, of which type there are 200,000 worldwide, can interfere
with pacemakers and that
this interaction can bring on missed or irregular heartbeats,
nausea, breathlessness, dizziness, and even fainting.

A. of which type there are 200,000 worldwide, can interfere with pacemakers and
that
B. of which, worldwide, there are 200,000 of that type, and which can interfere with
pacemakers, and
C. of which type there are 200,000 worldwide, they can interfere with pacemakers
and
D. 200,000 of which type exist worldwide, interfering with pacemakers, and
E. 200,000 of that type existing worldwide and can interfere with pacemakers, and

OA is D. Some guru who can explain why D is ok and why the others are wrong? Tksvm

_________________

Choose Life

Manager
Joined: 05 Apr 2007
Posts: 234

Show Tags

06 May 2009, 09:38
Dude "that" is used to create parallelism here.

A has announce that X and that Y..........You can find a number of examples based on this format............

pm4553 wrote:
What about "that" in A, isn't it an error?

D - 200,000 of which modifies "security surveillance system"

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

Choose Life

Re: Magnetic Fields   [#permalink] 06 May 2009, 09:38
Display posts from previous: Sort by