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30 Nov 2011, 19:54
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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:
25%
(medium)
Question Stats:
69% (00:49) correct
31%
(00:50)
wrong
based on 296
sessions
History
Date
Time
Result
Not Attempted Yet
Is N=W ?
(1) N = |W|
(2) W= |N|
(1) N = |W|
(2) W= |N|
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
sudish
Joined: 09 Sep 2011
Last visit: 15 Nov 2014
Posts: 120
Given Kudos: 16
Status:Enjoying the MBA journey :)
Location: United States (DC)
Concentration: General Management, Entrepreneurship
Schools: CBS '15 (D) Ross '15 (D) Anderson '15 (D) Johnson '15 (WL) ISB '14 (D) Kellogg '15 (D) Olin '15 (WA$) McDonough '15 (M)
GMAT 1: 710 Q49 V38
WE:Corporate Finance (Other)
Schools: CBS '15 (D) Ross '15 (D) Anderson '15 (D) Johnson '15 (WL) ISB '14 (D) Kellogg '15 (D) Olin '15 (WA$) McDonough '15 (M)
GMAT 1: 710 Q49 V38
Posts: 120
01 Dec 2011, 00:37
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Here's the solution:
We are asked whether N = W i.e. whether N & W have equal value.
Let's look at the given statements.
Statement 1 says that N = |W|
Let's take a few quick examples to check this.
If N = 0 and W = 0, then N = |W| = 0. Here, N = W
But, if N = 2 and W = -2, then |W| = 2 which is not equal to N = -2. Hence N not equal to W
This statement is not sufficient.
Lets look at the next statement. Statement 2 says that W = |N|
Let's take a few quick examples to check this.
If N = 0 and W = 0, then W = |N| = 0. Here, N = W
But, if N = -2 and W = 2, then |N| = 2 which equal to W but N is not equal to W
This statement is not sufficient.
Lets tak Statements 1 and 2 together:
E.g. N = W = 0 or any other number - positive or negative
N = |W| and W = |N| will not be satisified by any other combination of numbers.
Hence these statements together are sufficient.
The correct answer option is C
Hope this helps!
We are asked whether N = W i.e. whether N & W have equal value.
Let's look at the given statements.
Statement 1 says that N = |W|
Let's take a few quick examples to check this.
If N = 0 and W = 0, then N = |W| = 0. Here, N = W
But, if N = 2 and W = -2, then |W| = 2 which is not equal to N = -2. Hence N not equal to W
This statement is not sufficient.
Lets look at the next statement. Statement 2 says that W = |N|
Let's take a few quick examples to check this.
If N = 0 and W = 0, then W = |N| = 0. Here, N = W
But, if N = -2 and W = 2, then |N| = 2 which equal to W but N is not equal to W
This statement is not sufficient.
Lets tak Statements 1 and 2 together:
E.g. N = W = 0 or any other number - positive or negative
N = |W| and W = |N| will not be satisified by any other combination of numbers.
Hence these statements together are sufficient.
The correct answer option is C
Hope this helps!
01 Dec 2011, 03:26
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Poma777
Question: Is N = W?
Stmnt 1: N = |W|
[highlight]We see that N is positive[/highlight] or 0. W may be negative. e.g. N = 5, W = 5/-5.
So N = W may or may not hold.
Stmnt 2: W= |N|
[highlight]We see that W is positive[/highlight] or 0. N may be negative. e.g. W = 5, N = 5/-5.
So N = W may or may not hold.
Both together, we see that both N and W are positive. So |W| = W and |N| = N. Therefore, N must be equal to W. Sufficient.
Answer (C).
