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# Rock samples taken from the remains of an asteroid about

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Director
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14 Apr 2005, 19:25
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Question Stats:

63% (01:34) correct 37% (00:37) wrong based on 138 sessions

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Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47billion years old and thus is evidence of the earliest known asteroid impact on earth.
A. has been dated to be 3.47 billion years old and thus is
B. has been dated at 3.47 billion years old and thus
C. have been dated to be 3.47 billion years old and thus are
D. have been dated as being 3.47 billion years old and thus
E. have been dated at 3.47 billion years old and thus are
[Reveal] Spoiler: OA

Last edited by PiyushK on 27 Sep 2014, 10:11, edited 2 times in total.
updated OA
If you have any questions
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Director
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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14 Apr 2005, 20:13
I will go with 'C'

I think you usually say 'dated at x years' so now it is between A & C.
I eliminated A because we need 'have been' to compliment 'Rock Samples'
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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14 Apr 2005, 20:19
"E"...Rock sample plural...dated at is corect idiom I think
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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14 Apr 2005, 20:23
banerjeea_98 wrote:
"E"...Rock sample plural...dated at is corect idiom I think

dated at is the correct idiom but isn't dated at x years old is redundant.
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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14 Apr 2005, 20:25
C it is but the original question has a typo. "that" is required right after "asteroids"

"dated to be" gives the exact age of X --> an artwork dated to be 500 years old.
"dated at" refers to a particular period of time --> an artwork dated at the Renaissance period.
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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14 Apr 2005, 20:26
banerjeea_98 wrote:
"E"...Rock sample plural...dated at is corect idiom I think

dated at is the correct idiom but isn't dated at x years old is redundant.

ahhh! didn't see that (too much of wine today ) , yes "C" shud be it. I am going to sleep !
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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14 Apr 2005, 20:31
has been vs. have been. -> go with the latter. Rock samples are plural and require 'have been'. (A) and (B) are out.

the next split would be dated to be vs. dated as being vs. dated at.
The idiomatic form would be 'dated to be'. So (C) is the answer.
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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15 Apr 2005, 10:36
true that "dated at" is the correct idiom, but in this case i think it is C because age isn't "dated at", but a certain year is "dated at"
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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15 Apr 2005, 17:44
Thanks Paul. I was looking for someone to give some example of this Idiom.

OA: (C)
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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23 Oct 2010, 08:20
However GMATprep says that the right answer is D
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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23 Oct 2010, 23:30
ilgiz wrote:
However GMATprep says that the right answer is D

Huh?

OA is C.

I'm not sure what you are talking about.
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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07 May 2012, 11:16
scheol79 wrote:
ilgiz wrote:
However GMATprep says that the right answer is D

Huh?

OA is C.

I'm not sure what you are talking about.

The OA to this one is E. I answered it as C, but got it wrong. Could anyone tell me out of the following two options which idiom is correct:
(I)dated to be
(II)dated at
Please let me know which one of these two is correct.
Options A, B, and D are clearly wrong.
And Someone please post the OE for this one(for option E as the correct answer).
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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07 May 2012, 14:21
jpv wrote:
Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47billion years old and thus is evidence of the earliest known asteroid impact on earth.
A. has been dated to be 3.47 billion years old and thus is
B. has been dated at 3.47 billion years old and thus
C. have been dated to be 3.47 billion years old and thus are
D. have been dated as being 3.47 billion years old and thus
E. have been dated at 3.47 billion years old and thus are

corrected the TYPO

hello
here goes my analysis
the question test verb and subject aggreement
'rock samples ' is plural hence A and B are out
D is about since Being makes the sentence heavy and Gmat does not like being
dated at ? Seems wrong
have been dated to be is better hence C
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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07 May 2012, 16:39
The OA is E and here is the explanation FYI

http://www.manhattangmat.com/forums/roc ... t7051.html
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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18 Sep 2014, 02:38
E.. rock samples+have+dated at
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27 Sep 2014, 11:31
"dated at " is used for a time span (age)
"dated to be " is for event date.(25th, March 1947)
I guess that is why "E" is correct.
Please correct me if my analysis is wrong here.
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Re: Rock samples taken from the remains of an asteroid about [#permalink]

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20 Jul 2016, 11:23
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Re: Rock samples taken from the remains of an asteroid about   [#permalink] 20 Jul 2016, 11:23
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