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23 Jul 2021, 08:00
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
70% (01:39) correct
30%
(02:05)
wrong
based on 102
sessions
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Not Attempted Yet
Requiring a number of gyroscopic motion recalibrations which may amount to a sum of 100 per minute, an electric personal assistive mobility device employs delicate motors in order to maintain its passenger balanced while travelling on two parallel wheels
(A) Requiring a number of gyroscopic motion recalibrations which may amount to a sum of 100 per minute, an electric personal assistive mobility device
(B) An electric personal assistive mobility device requires up to 100 gyroscopic motion recalibrations per minute and
(C) Requiring a number of gyroscopic motion recalibrations which may amount up to 100 per minute, an electric personal assistive mobility devices
(D) Requiring a number of gyroscopic motion recalibrations which may amount up to 100 per minute, an electric personal assistive mobility device has to
(E) An electric personal assistive mobility device requires a number of gyroscopic motion recalibrations which may amount up to an extraordinary sum of 100 per minute
(A) Requiring a number of gyroscopic motion recalibrations which may amount to a sum of 100 per minute, an electric personal assistive mobility device
(B) An electric personal assistive mobility device requires up to 100 gyroscopic motion recalibrations per minute and
(C) Requiring a number of gyroscopic motion recalibrations which may amount up to 100 per minute, an electric personal assistive mobility devices
(D) Requiring a number of gyroscopic motion recalibrations which may amount up to 100 per minute, an electric personal assistive mobility device has to
(E) An electric personal assistive mobility device requires a number of gyroscopic motion recalibrations which may amount up to an extraordinary sum of 100 per minute
25 Jul 2021, 05:00
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OFFICIAL EXPLANATION
Requiring a number of gyroscopic motion recalibrations which may amount to a sum of 100 per minute, an electric personal assistive mobility device employs delicate motors in order to maintain its passenger balanced while travelling on two parallel wheels
(A) Requiring a number of gyroscopic motion recalibrations which may amount to a sum of 100 per minute, an electric personal assistive mobility device
This question is something, isn't it? You can read it again and again and yet comprehend little. Fortunately, Sentence Correction is rarely about grasping the meaning of the sentence. The focus is on sentence structure. And that's what Stop Signs are for: help you identify the mistake(s) via focusing on repeating structures that are known to be prone to error. In this case, the following Stop Sign helps us identify the question topic and the mistake:
amount to a sum
It tells us that this answer choice is stylistically flawed. Using both amount to and a sum is redundant.
(B) An electric personal assistive mobility device requires up to 100 gyroscopic motion recalibrations per minute and
This answer choice solves the redundancy issue in the original sentence.
(C) Requiring a number of gyroscopic motion recalibrations which may amount up to 100 per minute, an electric personal assistive mobility devices
While this answer choice corrects the original redundancy, it is grammatically incorrect. The plural subject devices does not agree with the singular verb employs.
The lesson to be learned here is the importance of paying close attention to details in the answer choices.
Do not assume that the only thing that changes in the answer choices is the part which was flawed in the original sentence. Different answer choices can make changes in various parts of the sentence.
The lesson to be learned here is not to automatically choose the first answer choice that corrects the original mistake. Remember that in Sentence Correction questions, we do not choose a correct answer but rather eliminate four incorrect answer choices and choose the last one standing.
After eliminating answer choices that repeat the original mistake (if there is one), you have to go over all the remaining answer choices carefully and compare them word for word. This is the only way you'll be able to correctly eliminate all but one of them.
(D) Requiring a number of gyroscopic motion recalibrations which may amount up to 100 per minute, an electric personal assistive mobility device has to
While this answer choice corrects the original redundancy, it is grammatically incorrect. The preposition to cannot be followed by the verb employs, which appears right after the underlined part. In order for this verb to correctly follow to, it must be in its base form (i.e., employ).
(E) An electric personal assistive mobility device requires a number of gyroscopic motion recalibrations which may amount up to an extraordinary sum of 100 per minute
This question is something, isn't it? You can read it again and again and yet comprehend little. Fortunately, Sentence Correction is rarely about grasping the meaning of the sentence. The focus is on sentence structure. And that's what Stop Signs are for: help you identify the mistake(s) via focusing on repeating structures that are known to be prone to error. In this case, the following Stop Sign helps us identify the question topic and the mistake:
amount to a sum
It tells us that this answer choice is stylistically flawed. Using both amount to and a sum is redundant.
Furthermore, the addition of the word extraordinary is also redundant.
