GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 19 Jan 2019, 23:01

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • FREE Quant Workshop by e-GMAT!

     January 20, 2019

     January 20, 2019

     07:00 AM PST

     07:00 AM PST

    Get personalized insights on how to achieve your Target Quant Score.
  • Free GMAT Strategy Webinar

     January 19, 2019

     January 19, 2019

     07:00 AM PST

     09:00 AM PST

    Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

x, y, and z are consecutive even numbers. What is the average of x, y,

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 52294
x, y, and z are consecutive even numbers. What is the average of x, y,  [#permalink]

Show Tags

New post 01 Jul 2018, 19:44
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

40% (00:45) correct 60% (00:42) wrong based on 57 sessions

HideShow timer Statistics

Manager
Manager
User avatar
G
Joined: 09 Jun 2018
Posts: 184
Location: United States
GPA: 3.95
WE: Manufacturing and Production (Energy and Utilities)
GMAT ToolKit User Premium Member
Re: x, y, and z are consecutive even numbers. What is the average of x, y,  [#permalink]

Show Tags

New post 01 Jul 2018, 19:50
IMO Option D.

As x,y,z are consecutive even numbers, average will be y. Also, x+2 = y = z-2.

Stmt 1: z = 12 Hence y = 10 Suff. Stmt 2: x = 8, Hence y = 10, Suff. Hence D
_________________

If you found this relevant and useful, please Smash that Kudos button!

Intern
Intern
avatar
B
Joined: 15 Aug 2012
Posts: 42
Schools: AGSM '19
GMAT ToolKit User
Re: x, y, and z are consecutive even numbers. What is the average of x, y,  [#permalink]

Show Tags

New post 02 Jul 2018, 13:38
Hi Bunuel

Is the OA: C because we're not told x, y and z are in ascending or descending order? Does GMAT really specify the order for these questions?
Director
Director
User avatar
P
Status: Learning stage
Joined: 01 Oct 2017
Posts: 951
WE: Supply Chain Management (Energy and Utilities)
Premium Member
x, y, and z are consecutive even numbers. What is the average of x, y,  [#permalink]

Show Tags

New post 05 Jul 2018, 09:07
Bunuel wrote:
x, y, and z are consecutive even numbers. What is the average of x, y, and z?

(1) z = 12
(2) x = 8


Average of 3 consecutive even numbers is always the middle number or median value.
So, y is the mean of x,y, and z.

St1:-z=12
y=10 when x<y<z
y=14 when x>y>z

Hence we have two values of average. So, insufficient.

St2:-x = 8
y=10 when x<y<z
y=6 when x>y>z

Hence we have two values of average. So, insufficient.

(1)+(2), y=10,(since x=8<z=12)
Hence,sufficient.

Ans, (C)
_________________

Regards,

PKN

Rise above the storm, you will find the sunshine

DS Forum Moderator
avatar
P
Joined: 21 Aug 2013
Posts: 1432
Location: India
Premium Member
Re: x, y, and z are consecutive even numbers. What is the average of x, y,  [#permalink]

Show Tags

New post 05 Jul 2018, 20:24
rajudantuluri wrote:
Hi Bunuel

Is the OA: C because we're not told x, y and z are in ascending or descending order? Does GMAT really specify the order for these questions?


Hello

YES, I think the OA is C because of the reason mentioned by you. We are able to get a unique answer only after combining both the statements.
Manager
Manager
avatar
S
Joined: 24 Dec 2017
Posts: 179
Location: India
Concentration: Strategy, Real Estate
Schools: Johnson '21
Re: x, y, and z are consecutive even numbers. What is the average of x, y,  [#permalink]

Show Tags

New post 06 Jul 2018, 09:28
X,Y,Z - Consecutive even numbers. Average of X,Y,Z?

I) z = 12: Insufficient as we are not about the order of numbers.

Case 1:

z=12
x=8
y=10

Case 2:

z=12
y=14
z=16

AD/BCE

II) x=8 Insufficient. Same as A

B

I + II: x=8,y=10,z=12. we are able to get an answer by combining the options. Hence C is the answer.
GMAT Club Bot
Re: x, y, and z are consecutive even numbers. What is the average of x, y, &nbs [#permalink] 06 Jul 2018, 09:28
Display posts from previous: Sort by

x, y, and z are consecutive even numbers. What is the average of x, y,

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.