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

It is currently 26 Apr 2019, 00:56

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

Is Z > 10 - Z ?

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

Hide Tags

 
Senior Manager
Senior Manager
avatar
Joined: 10 Jul 2013
Posts: 312
Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 10 Aug 2013, 11:56
1
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

65% (01:36) correct 35% (01:25) wrong based on 70 sessions

HideShow timer Statistics

Is Z > 10 - Z?
(1) Arnold scored Z points more than Jessie.
(2) Together Arnold and Jessie scored 10 points.

i need your opinions especially the way you think. That's why uploaded this. Will upload my solution soon

_________________
Asif vai.....
Director
Director
User avatar
Joined: 14 Dec 2012
Posts: 742
Location: India
Concentration: General Management, Operations
GMAT 1: 700 Q50 V34
GPA: 3.6
GMAT ToolKit User
Re: Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 10 Aug 2013, 12:48
Asifpirlo wrote:
Is Z > 10 - Z?
(1) Arnold scored Z points more than Jessie.
(2) Together Arnold and Jessie scored 10 points.

i need your opinions especially the way you think. That's why uploaded this. Will upload my solution soon

IS
\(Z > 10 - Z\)OR
\(Z>5\)

(1) Arnold scored Z points more than Jessie.
DONT KNOW Z hence insufficient

(2) Together Arnold and Jessie scored 10 points.
still insufficient.

combining also we dont anything about how much points each have,hence insufficient

hence E
_________________
When you want to succeed as bad as you want to breathe ...then you will be successfull....

GIVE VALUE TO OFFICIAL QUESTIONS...



GMAT RCs VOCABULARY LIST: http://gmatclub.com/forum/vocabulary-list-for-gmat-reading-comprehension-155228.html
learn AWA writing techniques while watching video : http://www.gmatprepnow.com/module/gmat-analytical-writing-assessment
: http://www.youtube.com/watch?v=APt9ITygGss
Intern
Intern
User avatar
Status: Bring it on.....!
Joined: 11 Jul 2013
Posts: 26
Location: India
Concentration: Technology
GMAT 1: 660 Q49 V31
Re: Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 10 Aug 2013, 22:21
Quote:
IS
\(Z > 10 - Z\)OR
\(Z>5\)

(1) Arnold scored Z points more than Jessie.
DONT KNOW Z hence insufficient

(2) Together Arnold and Jessie scored 10 points.
still insufficient.

combining also we dont anything about how much points each have,hence insufficient

hence E


Hi,

Could you please tell me why did you consider Z as a positive number and came to conclusion : Z>5

Thanks.
_________________
Live as if your were to die tomorrow. Learn as if you were to live forever - Gandhi
Director
Director
User avatar
Joined: 14 Dec 2012
Posts: 742
Location: India
Concentration: General Management, Operations
GMAT 1: 700 Q50 V34
GPA: 3.6
GMAT ToolKit User
Re: Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 10 Aug 2013, 22:25
nick28 wrote:
Quote:
IS
\(Z > 10 - Z\)OR
\(Z>5\)

(1) Arnold scored Z points more than Jessie.
DONT KNOW Z hence insufficient

(2) Together Arnold and Jessie scored 10 points.
still insufficient.

combining also we dont anything about how much points each have,hence insufficient

hence E


Hi,

Could you please tell me why did you consider Z as a positive number and came to conclusion : Z>5

Thanks.


HI nick ,

i didnt assumed any thing

see the question was:
is \(Z > 10 - Z\) ?
now if we solve this ...take -Z to LEFT HAND SIDE.
THEREFORE \(2Z > 10\) ==> hence in short question is asking IS \(Z> \frac{10}{2}\)

hope its clear.
_________________
When you want to succeed as bad as you want to breathe ...then you will be successfull....

GIVE VALUE TO OFFICIAL QUESTIONS...



GMAT RCs VOCABULARY LIST: http://gmatclub.com/forum/vocabulary-list-for-gmat-reading-comprehension-155228.html
learn AWA writing techniques while watching video : http://www.gmatprepnow.com/module/gmat-analytical-writing-assessment
: http://www.youtube.com/watch?v=APt9ITygGss
Intern
Intern
User avatar
Status: Bring it on.....!
Joined: 11 Jul 2013
Posts: 26
Location: India
Concentration: Technology
GMAT 1: 660 Q49 V31
Re: Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 10 Aug 2013, 22:34
blueseas wrote:
HI nick ,

i didnt assumed any thing

see the question was:
is \(Z > 10 - Z\) ?
now if we solve this ...take -Z to LEFT HAND SIDE.
THEREFORE \(2Z > 10\) ==> hence in short question is asking IS \(Z> \frac{10}{2}\)

hope its clear.


But without knowing the polarity of "Z", how can we move it around the ">" sign ?
_________________
Live as if your were to die tomorrow. Learn as if you were to live forever - Gandhi
Director
Director
User avatar
Joined: 14 Dec 2012
Posts: 742
Location: India
Concentration: General Management, Operations
GMAT 1: 700 Q50 V34
GPA: 3.6
GMAT ToolKit User
Re: Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 10 Aug 2013, 22:39
nick28 wrote:
blueseas wrote:
HI nick ,

i didnt assumed any thing

see the question was:
is \(Z > 10 - Z\) ?
now if we solve this ...take -Z to LEFT HAND SIDE.
THEREFORE \(2Z > 10\) ==> hence in short question is asking IS \(Z> \frac{10}{2}\)

hope its clear.


But without knowing the polarity of "Z", how can we move it around the ">" sign ?

GREAT thats a good HABIT.
TAKE A RULE: IN EQUALITIES YOU CAN MULTIPLY/DIVIDE A POSITIVE NUMBER WITHOUT CHANGING THE SIGN OF EQUALITY.
OK NOW IN THIS CASE.
i think you will be OK till here.: \(2Z > 10\)
now since 2 is positive i am dividing both sides with 2 .(SINCE 2 IS POSITIVE NUMBER THERE WILL BE NO CHANGE IN INEQUALITY SIGN)
now when you divide by 2 we get: \(Z> \frac{10}{2}\)

HOPE its clear.
_________________
When you want to succeed as bad as you want to breathe ...then you will be successfull....

GIVE VALUE TO OFFICIAL QUESTIONS...



GMAT RCs VOCABULARY LIST: http://gmatclub.com/forum/vocabulary-list-for-gmat-reading-comprehension-155228.html
learn AWA writing techniques while watching video : http://www.gmatprepnow.com/module/gmat-analytical-writing-assessment
: http://www.youtube.com/watch?v=APt9ITygGss
Intern
Intern
User avatar
Status: Bring it on.....!
Joined: 11 Jul 2013
Posts: 26
Location: India
Concentration: Technology
GMAT 1: 660 Q49 V31
Re: Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 10 Aug 2013, 22:51
blueseas wrote:
GREAT thats a good HABIT.
TAKE A RULE: IN EQUALITIES YOU CAN MULTIPLY/DIVIDE A POSITIVE NUMBER WITHOUT CHANGING THE SIGN OF EQUALITY.
OK NOW IN THIS CASE.
i think you will be OK till here.: \(2Z > 10\)
now since 2 is positive i am dividing both sides with 2 .(SINCE 2 IS POSITIVE NUMBER THERE WILL BE NO CHANGE IN INEQUALITY SIGN)
now when you divide by 2 we get: \(Z> \frac{10}{2}\)

HOPE its clear.


Hi blueseas,

Firstly thanks for these quick responses, really appreciate it :)
Now, the thing is I had apprehensions at the very first step when you moved "Z" on left hand side to get 2Z>10. Could you explain that part because at this step we don't know the polarity of Z and hence we shouldn't move it around since we won't know its impact on the equality sign.
_________________
Live as if your were to die tomorrow. Learn as if you were to live forever - Gandhi
Director
Director
User avatar
Joined: 14 Dec 2012
Posts: 742
Location: India
Concentration: General Management, Operations
GMAT 1: 700 Q50 V34
GPA: 3.6
GMAT ToolKit User
Re: Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 10 Aug 2013, 23:05
1
nick28 wrote:
blueseas wrote:
GREAT thats a good HABIT.
TAKE A RULE: IN EQUALITIES YOU CAN MULTIPLY/DIVIDE A POSITIVE NUMBER WITHOUT CHANGING THE SIGN OF EQUALITY.
OK NOW IN THIS CASE.
i think you will be OK till here.: \(2Z > 10\)
now since 2 is positive i am dividing both sides with 2 .(SINCE 2 IS POSITIVE NUMBER THERE WILL BE NO CHANGE IN INEQUALITY SIGN)
now when you divide by 2 we get: \(Z> \frac{10}{2}\)

HOPE its clear.


Hi blueseas,

Firstly thanks for these quick responses, really appreciate it :)
Now, the thing is I had apprehensions at the very first step when you moved "Z" on left hand side to get 2Z>10. Could you explain that part because at this step we don't know the polarity of Z and hence we shouldn't move it around since we won't know its impact on the equality sign.


INEQUALITY SIGN DOESNT CHANGE WHEN WE ADD OR SUBTRACT SAME THING FROM BOTH SIDE,

check this out:
help-me-understand-the-flipping-of-the-inequality-sign-94994.html#p735418

so in our case:
\(Z > 10-Z\)
now we will add Z TO BOTH SIDES (SO THERE WILL BE NO CHANGE IN INEQUALITY SIGN)
so it will become:
\(Z> \frac{10}{2}\)

LET ME KNOW IF STILL NOT CLEAR.
_________________
When you want to succeed as bad as you want to breathe ...then you will be successfull....

GIVE VALUE TO OFFICIAL QUESTIONS...



GMAT RCs VOCABULARY LIST: http://gmatclub.com/forum/vocabulary-list-for-gmat-reading-comprehension-155228.html
learn AWA writing techniques while watching video : http://www.gmatprepnow.com/module/gmat-analytical-writing-assessment
: http://www.youtube.com/watch?v=APt9ITygGss
Intern
Intern
User avatar
Status: Bring it on.....!
Joined: 11 Jul 2013
Posts: 26
Location: India
Concentration: Technology
GMAT 1: 660 Q49 V31
Re: Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 11 Aug 2013, 00:15
blueseas wrote:
INEQUALITY SIGN DOESNT CHANGE WHEN WE ADD OR SUBTRACT SAME THING FROM BOTH SIDE,

check this out:
help-me-understand-the-flipping-of-the-inequality-sign-94994.html#p735418

so in our case:
\(Z > 10-Z\)
now we will add Z TO BOTH SIDES (SO THERE WILL BE NO CHANGE IN INEQUALITY SIGN)
so it will become:
\(Z> \frac{10}{2}\)

LET ME KNOW IF STILL NOT CLEAR.


YES GOT IT. thanks!
_________________
Live as if your were to die tomorrow. Learn as if you were to live forever - Gandhi
Intern
Intern
avatar
B
Joined: 22 Apr 2013
Posts: 5
Re: Is Z > 10 - Z ?  [#permalink]

Show Tags

New post 25 Jul 2017, 03:37
A-J = Z
A+J= 10
Combining (1) and (2) statements
A and J can be 5,5 or 6,4 or 4,6
All of these provide different results. One solution not possible.Therefore, E
GMAT Club Bot
Re: Is Z > 10 - Z ?   [#permalink] 25 Jul 2017, 03:37
Display posts from previous: Sort by

Is Z > 10 - Z ?

  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®.