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Rock Samples

This topic has 7 member replies
varundaga05 Senior | Next Rank: 100 Posts Default Avatar
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Rock Samples

Post Wed May 26, 2010 3:28 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    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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    Haaress Master | Next Rank: 500 Posts Default Avatar
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    Post Wed May 26, 2010 6:44 pm
    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.

    The sentence requires 2 fixes.

    1. Subject -verb agreement .. Plural Suject - Samples - takes a plural verb Have.
    2. Idiom - Its unidiomatic to say Dated to be . The correct idiom is Dated at.

    The OA must be E.
    I hope that helps.

    neha.patni Master | Next Rank: 500 Posts Default Avatar
    Joined
    16 Dec 2009
    Posted:
    227 messages
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    3 times
    Test Date:
    12th Aug, 2010
    Target GMAT Score:
    700+
    Post Thu May 27, 2010 5:41 am
    varundaga05 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
    IMO C

    neha.patni Master | Next Rank: 500 Posts Default Avatar
    Joined
    16 Dec 2009
    Posted:
    227 messages
    Thanked:
    3 times
    Test Date:
    12th Aug, 2010
    Target GMAT Score:
    700+
    Post Thu May 27, 2010 5:42 am
    neha.patni wrote:
    varundaga05 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
    IMO C
    What is the OA?

    gmat_perfect Legendary Member
    Joined
    24 Feb 2010
    Posted:
    1083 messages
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    13 members
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    127 times
    Post Thu May 27, 2010 6:32 am
    varundaga05 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
    The answer should be E because of the following reasons:
    1. Rock samples need the verb "have".
    2. "Dated at" is preferable to "dated to be.

    ymach3 Senior | Next Rank: 100 Posts Default Avatar
    Joined
    13 Jul 2009
    Posted:
    51 messages
    Thanked:
    1 times
    Post Thu May 27, 2010 7:22 am
    One more for E...

    Rock samples...... have.

    dated at - correct idiom.

    akhpad Legendary Member Default Avatar
    Joined
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    50 times
    Post Thu May 27, 2010 9:20 am
    Yup, dated at is correct idiom. Answer should be E

    GMAT/MBA Expert

    Post Thu May 27, 2010 10:59 am
    Haaress 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.

    The sentence requires 2 fixes.

    1. Subject -verb agreement .. Plural Suject - Samples - takes a plural verb Have.
    2. Idiom - Its unidiomatic to say Dated to be . The correct idiom is Dated at.

    The OA must be E.
    I hope that helps.
    Great explanation

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