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Rock samples taken from the remains of an asteroid about [#permalink]
 21 Sep 2012, 23:51
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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 3.47 billion 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
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MBA Section Director
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 00:14
Concept tested: Idioms, SV agreement Difficulty Level: Moderate Illustration: “Rock samples” is the subject for the verb “has been dated”. Rock samples must take a plural verb. So A and B can be instantly eliminated. Dated at is the correct idiomatic construction. So C and D are also eliminated E is the correct answer choiceTip: Though “dated at” is preferred to “dated to be”, the same construction is not necessarily true for “estimated at” and “estimated to be” construction. “Estimated at” should be followed by a noun because “at” is a preposition. E.g: The molten iron is estimated at 1500 degrees Celsius. “Estimated to be” generally follows phrases E.g: The fossil is estimated to be 1000 years old. This is NOT a specific English rule, but the way GMAT wants things to be Support is given by: In OG 12, Q 27 of SC, it says that the correct idiom is "estimated to be". However this question appears in gmatprep "With surface temperatures estimated at minus 230 degrees Farenheit, Jupiter's moon Europa has long been considered far too cold to support life, and with 60 square miles of water though to be frozen from top to bottom."
We can see from the non underlined part that "estimated at" is also as correct idiom. Takeaway: Same rules do not apply to "estimated to be" and "dated to be"
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 00:45
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Answer E
Subject-Verb agreement error :
Rocks samples -> Plural therefore needs plural verbs HAVE & ARE (A ,B & D out)
D uses -ing form of verb which is wrong.
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 01:46
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souvik101990 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 3.47 billion 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 As rightly written by @Archillees - SV Agreement error > Also to note is Difference between C and E C uses subjunctive form - "to be" which is not required here. E uses correct idiom "dated at"
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 02:05
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 03:34
samples are plural so have. C) is ackward have to be D) beiang is wrong and lack of are at the end E) is correct For me is not a 700 level
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 06:03
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souvik101990 wrote: Before moving to OE
What is the correct idiom for:
estimated to be Vs estimated at? I guess it would depend how one is using these 2 expressions, estimated at = uses at which is a preposition, so it would need a noun! estimated to be - I think it should work when referring with respect to some verb!!! I remember Ron discussed something on similar lines on an another forum.....
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 13:38
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 13:42
methevoid wrote: souvik101990 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 3.47 billion 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 As rightly written by @Archillees - SV Agreement error > Also to note is Difference between C and E C uses subjunctive form - "to be" which is not required here. E uses correct idiom "dated at" Hey, "to be" is neither used as a command subjunctive nor used as a hypothetical subjunctive. For them you need special command verbs like demand, order, require etc. They are popularly known as "bossy verbs" Hypothetical subjunctive, as the name suggests, uses hypothetical constructions such as "were", "would" etc. Souvik
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 15:33
souvik101990 wrote: methevoid wrote: souvik101990 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 3.47 billion 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 As rightly written by @Archillees - SV Agreement error > Also to note is Difference between C and E C uses subjunctive form - "to be" which is not required here. E uses correct idiom "dated at" Hey, "to be" is neither used as a command subjunctive nor used as a hypothetical subjunctive. For them you need special command verbs like demand, order, require etc. They are popularly known as "bossy verbs" Hypothetical subjunctive, as the name suggests, uses hypothetical constructions such as "were", "would" etc. Souvik Hey Souvik Your reply was really nice one but couldnt get it can you explain in simpler terms i know what you have explained is simple, but i did not get that
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MBA Section Director
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Re: Rock samples taken from the remains of an [#permalink]
22 Sep 2012, 15:51
Archit143 wrote: Hey Souvik
Your reply was really nice one but couldnt get it can you explain in simpler terms i know what you have explained is simple, but i did not get that Hey Archit, Welcome to gmatclub. Now before me going on with what you asked for, can you explain what you didn't understand? If you didn't understand the command or hypothetical subjunctive, then I could break it down for you. Go through the MGMAT SC for subjunctive and also this particular article. If you are still having issues, come back here and I would be happy to help you out. http://gmat-grammar.blogspot.in/2006/06 ... verbs.html
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Re: Rock samples taken from the remains of an [#permalink]
23 Sep 2012, 03:55
souvik101990 wrote: Hey,
"to be" is neither used as a command subjunctive nor used as a hypothetical subjunctive.
For them you need special command verbs like demand, order, require etc.
They are popularly known as "bossy verbs"
Hypothetical subjunctive, as the name suggests, uses hypothetical constructions such as "were", "would" etc.
Souvik Oh yes, i totally missed that - those verbs aren't here, its just use of be-form, Thnks souvik, have made a note of it and read that link on subjunctive, it was nice.,
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Re: Rock samples taken from the remains of an asteroid about [#permalink]
10 Oct 2012, 00:34
Concept tested: Idioms, SV agreement Difficulty Level: Moderate Illustration: “Rock samples” is the subject for the verb “has been dated”. Rock samples must take a plural verb. So A and B can be instantly eliminated. Dated at is the correct idiomatic construction. So C and D are also eliminated E is the correct answer choiceTip: Though “dated at” is preferred to “dated to be”, the same construction is not necessarily true for “estimated at” and “estimated to be” construction. “Estimated at” should be followed by a noun because “at” is a preposition. E.g: The molten iron is estimated at 1500 degrees Celsius. “Estimated to be” generally follows phrases E.g: The fossil is estimated to be 1000 years old. This is NOT a specific English rule, but the way GMAT wants things to be Support is given by: In OG 12, Q 27 of SC, it says that the correct idiom is "estimated to be". However this question appears in gmatprep "With surface temperatures estimated at minus 230 degrees Farenheit, Jupiter's moon Europa has long been considered far too cold to support life, and with 60 square miles of water though to be frozen from top to bottom."
We can see from the non underlined part that "estimated at" is also as correct idiom. Takeaway: Same rules do not apply to "estimated to be" and "dated to be"
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Re: Rock samples taken from the remains of an asteroid about [#permalink]
11 Oct 2012, 08:04
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Rock samples _______________ has been dated to be 3.47 billion years old and thus is evidence ___________.
(A) has been dated to be3.47 billion years old and thusis
(B) has been dated at 3.47 billion years old and thus
(C) have been dated to be3.47 billion years old and thus are
(D) have been dated as being3.47 billion years old and thus
(E) have been dated at 3.47 billion years old and thus are[/quote]
Rock samples - Plural requires have and are
Correct Idiom is dated at
Answer is: E
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Re: Rock samples taken from the remains of an [#permalink]
22 Nov 2012, 09:31
souvik101990 wrote: Concept tested: Idioms, SV agreement Difficulty Level: Moderate Illustration: “Rock samples” is the subject for the verb “has been dated”. Rock samples must take a plural verb. So A and B can be instantly eliminated. Dated at is the correct idiomatic construction. So C and D are also eliminated E is the correct answer choiceTip: Though “dated at” is preferred to “dated to be”, the same construction is not necessarily true for “estimated at” and “estimated to be” construction. “Estimated at” should be followed by a noun because “at” is a preposition. E.g: The molten iron is estimated at 1500 degrees Celsius. “Estimated to be” generally follows phrases E.g: The fossil is estimated to be 1000 years old. This is NOT a specific English rule, but the way GMAT wants things to be Support is given by: In OG 12, Q 27 of SC, it says that the correct idiom is "estimated to be". However this question appears in gmatprep "With surface temperatures estimated at minus 230 degrees Farenheit, Jupiter's moon Europa has long been considered far too cold to support life, and with 60 square miles of water though to be frozen from top to bottom."
We can see from the non underlined part that "estimated at" is also as correct idiom. Takeaway: Same rules do not apply to "estimated to be" and "dated to be" GREAT, so we have to remember "estimated to be" and "dated at" are prefered when we have to choose between the 2 things purely grammartical.
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Re: Rock samples taken from the remains of an asteroid about [#permalink]
22 Nov 2012, 09:55
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Re: Rock samples taken from the remains of an asteroid about [#permalink]
06 Dec 2012, 22:12
dated at
estimated to be
is correct idiom on gmat, maybe not on general grammar
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Re: Rock samples taken from the remains of an asteroid about [#permalink]
07 Dec 2012, 02:42
Well the standard approach. Look for the 2X3 split. eliminate a and b as the subject 'rock samples' is plural. C-dated to be is the wrong usage. d- again wrong usage of being. e- the only option left.
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Re: Rock samples taken from the remains of an asteroid about
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07 Dec 2012, 02:42
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