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30 Aug 2021, 00:55
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testtakerstrategy
Well, we should certainly start with grammar. Only C and E have valid sentence cores. After that, we have to use the idioms to make our choice because that's all that's left. Many of us don't recommend starting with idioms because there's so much diversity in correct usage that it's really easy to knock off valid answers as incorrect just because we prefer one idiom over the other. However, idioms are certainly tested on the GMAT, and if two answers are identical in all other regards, then idioms it must be. In some cases, either idiom might work on its own, but only one is parallel with some other usage in the sentence. However, we don't even have that to lean on here. We just have to know that "dated at" is the way to go.
Well, we should certainly start with grammar. Only C and E have valid sentence cores. After that, we have to use the idioms to make our choice because that's all that's left. Many of us don't recommend starting with idioms because there's so much diversity in correct usage that it's really easy to knock off valid answers as incorrect just because we prefer one idiom over the other. However, idioms are certainly tested on the GMAT, and if two answers are identical in all other regards, then idioms it must be. In some cases, either idiom might work on its own, but only one is parallel with some other usage in the sentence. However, we don't even have that to lean on here. We just have to know that "dated at" is the way to go.
14 Sep 2021, 20:41
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EMPOWERgmatVerbal
Hello Everyone!
Let's tackle this question, one thing at a time, and narrow it down to the correct choice quickly! Here is the original question, with the major differences between each option highlighted in orange:
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
After a quick glance over the options, there are a few places we can focus on to narrow down our choices:
1. has been vs. have been (Subject-Verb Agreement)
2. dated to be / at / as being (Idioms)
3. thus is / thus / thus are (Subject-Verb Agreement / Meaning)
Let's start with #1 on our list because it will eliminate 2-3 options right away. This is a matter of subject-verb agreement! If we look closely at the original sentence, we can find the subject:
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.
We see that the subject "rock samples" is plural, which means we need to use a plural verb to match:
(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
We can eliminate options A & B because they use a singular verb with a plural subject, which doesn't match.
Now that we have it narrowed down to only 3 options, let's tackle #2 on our list: idiom structure. Whenever we say that an item is "dated" a certain age, there is a particular way to word it. We typically say that something is "dated at" a certain age! Let's take a closer look:
(C) have been dated to be 3.47 billion years old and thus are --> not idiomatically correct = WRONG
(D) have been dated as being 3.47 billion years old and thus --> not idiomatically correct = WRONG
(E) have been dated at 3.47 billion years old and thus are --> idiomatically correct = CORRECT
There you have it - option E is the correct choice! It's the only one that uses proper subject-verb agreement and proper idiom formatting!
Don't study for the GMAT. Train for it.
Let's tackle this question, one thing at a time, and narrow it down to the correct choice quickly! Here is the original question, with the major differences between each option highlighted in orange:
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
After a quick glance over the options, there are a few places we can focus on to narrow down our choices:
1. has been vs. have been (Subject-Verb Agreement)
2. dated to be / at / as being (Idioms)
3. thus is / thus / thus are (Subject-Verb Agreement / Meaning)
Let's start with #1 on our list because it will eliminate 2-3 options right away. This is a matter of subject-verb agreement! If we look closely at the original sentence, we can find the subject:
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.
We see that the subject "rock samples" is plural, which means we need to use a plural verb to match:
(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
We can eliminate options A & B because they use a singular verb with a plural subject, which doesn't match.
Now that we have it narrowed down to only 3 options, let's tackle #2 on our list: idiom structure. Whenever we say that an item is "dated" a certain age, there is a particular way to word it. We typically say that something is "dated at" a certain age! Let's take a closer look:
(C) have been dated to be 3.47 billion years old and thus are --> not idiomatically correct = WRONG
(D) have been dated as being 3.47 billion years old and thus --> not idiomatically correct = WRONG
(E) have been dated at 3.47 billion years old and thus are --> idiomatically correct = CORRECT
There you have it - option E is the correct choice! It's the only one that uses proper subject-verb agreement and proper idiom formatting!
Don't study for the GMAT. Train for it.
Hi, thanks for the great analysis. However I have some doubt in the Idiom usage on this one. I get the part that we say "Dated at" instead of other versions, however the phrase/structure "dated at...certain years old" makes it a bit illogical right given the presence of the word "old" after the part dated at certain years ...?
THAT is why i preferred dated to be certain years old version
Please share your thoughts. EMPOWERgmatVerbal
Kittle
15 Sep 2021, 16:58
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kittle
EMPOWERgmatVerbal
Hello Everyone!
Let's tackle this question, one thing at a time, and narrow it down to the correct choice quickly! Here is the original question, with the major differences between each option highlighted in orange:
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
After a quick glance over the options, there are a few places we can focus on to narrow down our choices:
1. has been vs. have been (Subject-Verb Agreement)
2. dated to be / at / as being (Idioms)
3. thus is / thus / thus are (Subject-Verb Agreement / Meaning)
Let's start with #1 on our list because it will eliminate 2-3 options right away. This is a matter of subject-verb agreement! If we look closely at the original sentence, we can find the subject:
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.
We see that the subject "rock samples" is plural, which means we need to use a plural verb to match:
(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
We can eliminate options A & B because they use a singular verb with a plural subject, which doesn't match.
Now that we have it narrowed down to only 3 options, let's tackle #2 on our list: idiom structure. Whenever we say that an item is "dated" a certain age, there is a particular way to word it. We typically say that something is "dated at" a certain age! Let's take a closer look:
(C) have been dated to be 3.47 billion years old and thus are --> not idiomatically correct = WRONG
(D) have been dated as being 3.47 billion years old and thus --> not idiomatically correct = WRONG
(E) have been dated at 3.47 billion years old and thus are --> idiomatically correct = CORRECT
There you have it - option E is the correct choice! It's the only one that uses proper subject-verb agreement and proper idiom formatting!
Don't study for the GMAT. Train for it.
Let's tackle this question, one thing at a time, and narrow it down to the correct choice quickly! Here is the original question, with the major differences between each option highlighted in orange:
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
After a quick glance over the options, there are a few places we can focus on to narrow down our choices:
1. has been vs. have been (Subject-Verb Agreement)
2. dated to be / at / as being (Idioms)
3. thus is / thus / thus are (Subject-Verb Agreement / Meaning)
Let's start with #1 on our list because it will eliminate 2-3 options right away. This is a matter of subject-verb agreement! If we look closely at the original sentence, we can find the subject:
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.
We see that the subject "rock samples" is plural, which means we need to use a plural verb to match:
(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
We can eliminate options A & B because they use a singular verb with a plural subject, which doesn't match.
Now that we have it narrowed down to only 3 options, let's tackle #2 on our list: idiom structure. Whenever we say that an item is "dated" a certain age, there is a particular way to word it. We typically say that something is "dated at" a certain age! Let's take a closer look:
(C) have been dated to be 3.47 billion years old and thus are --> not idiomatically correct = WRONG
(D) have been dated as being 3.47 billion years old and thus --> not idiomatically correct = WRONG
(E) have been dated at 3.47 billion years old and thus are --> idiomatically correct = CORRECT
There you have it - option E is the correct choice! It's the only one that uses proper subject-verb agreement and proper idiom formatting!
Don't study for the GMAT. Train for it.
Hi, thanks for the great analysis. However I have some doubt in the Idiom usage on this one. I get the part that we say "Dated at" instead of other versions, however the phrase/structure "dated at...certain years old" makes it a bit illogical right given the presence of the word "old" after the part dated at certain years ...?
THAT is why i preferred dated to be certain years old version
Please share your thoughts. EMPOWERgmatVerbal
Kittle
Great question kittle!
While it can seem redundant to say "dated at X years old," we still need to say "old" because it's clearer to readers that we're talking about the age of something, not the year it was found. Here's an example:
The painting was dated at 1845. --> The painting was created in 1845.
The painted was dated at 1845 years old. --> The painting was created in 176 A.D.
We hope that helps! Feel free to tag us at EMPOWERgmatVerbal with any more questions you have!
