Last visit was: 26 Apr 2026, 13:32 It is currently 26 Apr 2026, 13:32
Home
Messages
Tests
Schools
Events
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
avatar
pmenon
avatar
Joined: 28 Dec 2005
Last visit: 01 Jul 2009
Posts: 691
Own Kudos:
620
Given Kudos: 2
Posts: 691
Kudos: 620
8x+4y+5z=3 x,y,z are positive numbers what is x? (1)4y is an 10 Jan 2009, 08:30
Kudos
Add Kudos
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

History

Date
Time
Result
Not Attempted Yet
8x+4y+5z=3，x,y,z are positive numbers，what is x?
(1)4y is an integer
(2)5z is an integer



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
alpha_plus_gamma
User avatar
Joined: 14 Aug 2007
Last visit: 17 Jun 2010
Posts: 298
Own Kudos:
641
Concentration: MC, PE, VC
Posts: 298
Kudos: 641
8x+4y+5z=3 x,y,z are positive numbers what is x? (1)4y is an 10 Jan 2009, 09:06
Kudos
Add Kudos
Bookmarks
Bookmark this Post
off the top of my head i will go for c here, but I am not sure.

x,y, z have to be fractions otherwise the sum of 8* + 4 * + 5 * wont add up to 3.

A. y can be 1/4 or 1/2 but A alone is not suff
B. z can be 1/5

together y cant be 1/2 as x is positive number, so y=1/4

suff to calculate x.

but i m not sure about the answer.
User avatar
tusharvk
User avatar
Joined: 04 Jan 2009
Last visit: 24 May 2011
Posts: 119
Own Kudos:
21
Concentration: finance & strategy
Posts: 119
Kudos: 21
8x+4y+5z=3 x,y,z are positive numbers what is x? (1)4y is an 10 Jan 2009, 14:57
Kudos
Add Kudos
Bookmarks
Bookmark this Post
I also get c because both 4y and 5z being positive inntegers we can solve for x.
alpha_plus_gamma
off the top of my head i will go for c here, but I am not sure.

x,y, z have to be fractions otherwise the sum of 8* + 4 * + 5 * wont add up to 3.

A. y can be 1/4 or 1/2 but A alone is not suff
B. z can be 1/5

together y cant be 1/2 as x is positive number, so y=1/4

suff to calculate x.

but i m not sure about the answer.
Show more
User avatar
Bidisha
User avatar
Joined: 24 Sep 2008
Last visit: 21 Jul 2010
Posts: 43
Own Kudos:
9
Posts: 43
Kudos: 9
8x+4y+5z=3 x,y,z are positive numbers what is x? (1)4y is an 10 Jan 2009, 15:25
Kudos
Add Kudos
Bookmarks
Bookmark this Post
(A) & (B) are insuff

4y can be any integer such as 1, 2, 3 etc
5z can be any integer such as 1, 2, 3, 5 etc

8x+4y+5z =3

4y = 2
5z = 1
x=0

But 0 is neither negative nor positive so this is not acceptable value of x.

the only other possibility is :
4y=1
5z=1
x=1/8

(C)
User avatar
GMAT TIGER
User avatar
Joined: 29 Aug 2007
Last visit: 17 Aug 2011
Posts: 1,012
Own Kudos:
1,796
Given Kudos: 19
Posts: 1,012
Kudos: 1,796
8x+4y+5z=3 x,y,z are positive numbers what is x? (1)4y is an 10 Jan 2009, 22:20
Kudos
Add Kudos
Bookmarks
Bookmark this Post
pmenon
8x+4y+5z=3，x,y,z are positive numbers，what is x?

(1)4y is an integer
(2)5z is an integer
Show more

Agree wih C.

good one. 8-)
User avatar
chicagocubsrule
User avatar
Joined: 02 Nov 2008
Last visit: 27 Nov 2009
Posts: 163
Own Kudos:
608
Given Kudos: 2
Posts: 163
Kudos: 608
8x+4y+5z=3 x,y,z are positive numbers what is x? (1)4y is an 10 Jan 2009, 22:51
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bidisha
(A) & (B) are insuff

4y can be any integer such as 1, 2, 3 etc
5z can be any integer such as 1, 2, 3, 5 etc

8x+4y+5z =3

4y = 2
5z = 1
x=0

But 0 is neither negative nor positive so this is not acceptable value of x.

the only other possibility is :
4y=1
5z=1
x=1/8

(C)
Show more

C and I must admit this is a good explanation (which is the same one i was about to type).



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
Moderators:
Bunuel
Math Expert
109880 posts
GMATBusters
GMAT Tutor
1922 posts