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13 Oct 2021, 01:30
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
47% (01:01) correct
53%
(00:50)
wrong
based on 290
sessions
History
Date
Time
Result
Not Attempted Yet
Is n < 0
(1) -n = |-n|
(2) n^2 = 16
(1) -n = |-n|
(2) n^2 = 16
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
13 Oct 2021, 02:44
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1) This tells us that n is a negative number. However, n could also be 0. Insufficient
2) n^2 = 16
n = 4 or n = -4 Insufficient
1+2) Together they eliminate the possibility of n being 0 or n being 4. Therefore n = -4
Answer C
2) n^2 = 16
n = 4 or n = -4 Insufficient
1+2) Together they eliminate the possibility of n being 0 or n being 4. Therefore n = -4
Answer C
13 Oct 2021, 07:50
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Is n < 0
(1) -n = |-n|
If n = 1 --> -1 = |-1| --> Wrong
If n = -1 --> 1 = |1| --> Wright
If n = 0 --> 0 = |0| --> Right
--> n < 0 or n = 0
This condition cannot help us to answer the main question.
(2) n^2 = 16
--> n = -4 or n = 4
This condition cannot help us to answer the main question.
(3) Both (1) and (2):
n = -4 is sufficient
--> Answer C
(1) -n = |-n|
If n = 1 --> -1 = |-1| --> Wrong
If n = -1 --> 1 = |1| --> Wright
If n = 0 --> 0 = |0| --> Right
--> n < 0 or n = 0
This condition cannot help us to answer the main question.
(2) n^2 = 16
--> n = -4 or n = 4
This condition cannot help us to answer the main question.
(3) Both (1) and (2):
n = -4 is sufficient
--> Answer C
