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QOTD#26 x, y, and z are consecutive even integers

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GMAT Club Legend
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Joined: 07 Jun 2014
Posts: 4710
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
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Kudos [?]: 1612 [0], given: 375

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QOTD#26 x, y, and z are consecutive even integers [#permalink] New post 02 Oct 2016, 09:03
Expert's post
00:00

Question Stats:

56% (00:33) correct 43% (00:20) wrong based on 16 sessions
x, y, and z are consecutive even integers

Quantity A
Quantity B
xy
yz


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: 4
Page: 282
[Reveal] Spoiler: OA

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Sandy
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GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4710
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 91

Kudos [?]: 1612 [0], given: 375

CAT Tests
Re: QOTD#26 x, y, and z are consecutive even integers [#permalink] New post 02 Oct 2016, 09:08
Expert's post
Explanation

Try Plugging In; one set of values that could work is x = −2, y = 0, and z = 2.

In this case, both Quantity A and Quantity B have a value of 0. Eliminate choices A and B.

However, another set of values that could work is x = −6, y = −4, and z = −2.

With this set of values, Quantity A has a value of 24 and Quantity B has a value of 8. Eliminate choice C. You are left with choice D for the answer.
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Re: QOTD#26 x, y, and z are consecutive even integers [#permalink] New post 12 Nov 2016, 06:56
Expert's post
sandy wrote:
x, y, and z are consecutive even integers

Quantity A
Quantity B
xy
yz


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.



Let's test some values.

Try x = -2, y = 0 and z = 2 (NOTE: 0 is even, so these ARE consecutive even integers)
Quantity A: xy = (-2)(0) = 0
Quantity B: yz = (0)(2) = 0
The Quantities are equal

Try x = 0, y = 2 and z = 4
Quantity A: xy = (0)(2) = 0
Quantity B: yz = (2)(4) = 8
Quantity B is greater

Answer:
[Reveal] Spoiler:
D


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Re: QOTD#26 x, y, and z are consecutive even integers   [#permalink] 12 Nov 2016, 06:56
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QOTD#26 x, y, and z are consecutive even integers

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