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QOTD#27 Quant Comparison y < 0

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QOTD#27 Quant Comparison y < 0 [#permalink] New post 07 Oct 2016, 12:49
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Question Stats:

87% (00:24) correct 12% (00:35) wrong based on 58 sessions
y < 0

Quantity A
Quantity B
2y
20y


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.


Drill 1
Question: 7
Page: 283
[Reveal] Spoiler: OA

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Kudos [?]: 2045 [1] , given: 397

Re: QOTD#27 Quant Comparison y < 0 [#permalink] New post 07 Oct 2016, 12:52
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Explanation

When y = −1, Quantity A is −2 and Quantity B is −20. Eliminate choices (B) and (C). Plug in another value for y. When y = −100, Quantity A is −200 and Quantity B is −2,000. Quantity A is always greater.

Hence A is the correct option.
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Re: QOTD#27 Quant Comparison y < 0 [#permalink] New post 12 Nov 2016, 07:31
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sandy wrote:
y < 0

Quantity A
Quantity B
2y
20y



Another approach is to use matching operations

Quantity A: 2y
Quantity B: 20y

Subtract 2y from both quantities
Quantity A: 0
Quantity B: 18y

Divide both quantities by 18
Quantity A: 0
Quantity B: y

Since we're told that y < 0 (y is negative), we can conclude that quantity A is greater.
Answer:
[Reveal] Spoiler:
A



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Re: QOTD#27 Quant Comparison y < 0   [#permalink] 12 Nov 2016, 07:31
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