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Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
|x + y|...
[#permalink]
Updated on: 13 Sep 2020, 14:57
Updated on: 13 Sep 2020, 14:57
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Quantity A |
Quantity B |
|x + y| |
|x| + |y| |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Note: These questions are designed to help students master quantitative comparison questions: https://www.greenlighttestprep.com/modu ... comparison
Originally posted by GreenlightTestPrep on 27 Jul 2016, 15:08.
Last edited by GreenlightTestPrep on 13 Sep 2020, 14:57, edited 3 times in total.
Last edited by GreenlightTestPrep on 13 Sep 2020, 14:57, edited 3 times in total.
Editing the post and adding the tags
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: |x + y|...
[#permalink]
28 Jul 2016, 10:05
28 Jul 2016, 10:05
1
GreenlightTestPrep wrote:
Quantity A |
Quantity B |
|x + y| |
|x| + |y| |
Let's use the strategy called LOOKING FOR EQUALITY.
Looking at the two quantities, I can see that they are EQUAL when x = 0 and y = 0
We get:
Quantity A: |x + y| = |0 + 0| = |0| = 0
Quantity B: |x| + |y| = |0| + |0| = 0 + 0 = 0
The two quantities are EQUAL
At this point, we know the correct answer is C or D
Now try some other values for x and y.
How about: x = -1 and y = 1
We get:
Quantity A: |x + y| = |-1 + 1| = |0| = 0
Quantity B: |x| + |y| = |-1| + |1| = 1 + 1 = 2
The two quantities are NOT EQUAL
Answer:
Show: ::
D
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