Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 24 Oct 2016, 17:26

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Is x = |y - z|?

Author Message
Senior Manager
Joined: 16 Apr 2009
Posts: 339
Followers: 1

Kudos [?]: 117 [0], given: 14

Is x = |y - z|? [#permalink]

### Show Tags

27 Aug 2009, 17:32
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Is x = |y - z|?
(1) x = y -z
(2) y > z

Please provide explainations , I can see that 2nd is required . my confusion is whether 1st is required at all?
_________________

Manager
Joined: 24 Aug 2009
Posts: 150
Followers: 5

Kudos [?]: 94 [0], given: 46

Re: Is x = |y - z|? [#permalink]

### Show Tags

27 Aug 2009, 17:50
ichha148 wrote:
Is x = |y - z|?
(1) x = y -z
(2) y > z

Please provide explainations , I can see that 2nd is required . my confusion is whether 1st is required at all?

My choice is both together is required

1) from statement 1, X= y-z, X can be +ve if only Y>Z and this will prove that x =mod (y-Z)

hence we need both the statement
Manager
Joined: 10 Aug 2009
Posts: 130
Followers: 3

Kudos [?]: 64 [0], given: 10

Re: Is x = |y - z|? [#permalink]

### Show Tags

27 Aug 2009, 21:31
ichha148 wrote:
Is x = |y - z|?
(1) x = y -z
(2) y > z

Please provide explainations , I can see that 2nd is required . my confusion is whether 1st is required at all?

Of course, 1st statement is required.

Statement 1: defines a function x=f(y,z)=y-z. Without this definition you know nothing about x. Howerever, it is not sufficient to answer since y-z can be negative, in which case $$\mid y-z\mid =z-y$$
Statement 2: just states that y>z...nothing about x....

Combined, you can answer the question. Since y-z>0, $$\mid y-z\mid =y-z$$
Manager
Joined: 13 Jan 2009
Posts: 170
Followers: 4

Kudos [?]: 23 [0], given: 9

Re: Is x = |y - z|? [#permalink]

### Show Tags

28 Aug 2009, 00:09
Both statements are required. In second we don't have information about x. In first you don't have enough information about x and y to answer a question. Thus C.
Intern
Joined: 14 Aug 2009
Posts: 7
Followers: 0

Kudos [?]: 0 [0], given: 18

Re: Is x = |y - z|? [#permalink]

### Show Tags

28 Aug 2009, 00:46
C,

for 1), (y-z)>0 or (y-z)<0
Senior Manager
Joined: 16 Apr 2009
Posts: 339
Followers: 1

Kudos [?]: 117 [0], given: 14

Re: Is x = |y - z|? [#permalink]

### Show Tags

29 Aug 2009, 11:24
LenaA wrote:
ichha148 wrote:
Is x = |y - z|?
(1) x = y -z
(2) y > z

Please provide explainations , I can see that 2nd is required . my confusion is whether 1st is required at all?

Of course, 1st statement is required.

Statement 1: defines a function x=f(y,z)=y-z. Without this definition you know nothing about x. Howerever, it is not sufficient to answer since y-z can be negative, in which case $$\mid y-z\mid =z-y$$
Statement 2: just states that y>z...nothing about x....

Combined, you can answer the question. Since y-z>0, $$\mid y-z\mid =y-z$$

hummm , thanks , i did not realize that I know nothing about x and 1st provide that relation
_________________

Suspended Member
Joined: 29 Jul 2009
Posts: 16
Followers: 0

Kudos [?]: 52 [2] , given: 0

Re: Is x = |y - z|? [#permalink]

### Show Tags

29 Aug 2009, 11:57
2
KUDOS
statement 1 is critical it defines a function x=f(y,z)=y-z.
Hence both are required
Manager
Joined: 28 Aug 2009
Posts: 196
Followers: 2

Kudos [?]: 76 [0], given: 1

Re: Is x = |y - z|? [#permalink]

### Show Tags

29 Aug 2009, 12:01
ichha148 wrote:
LenaA wrote:
ichha148 wrote:
Is x = |y - z|?
(1) x = y -z
(2) y > z

Please provide explainations , I can see that 2nd is required . my confusion is whether 1st is required at all?

Of course, 1st statement is required.

Statement 1: defines a function x=f(y,z)=y-z. Without this definition you know nothing about x. Howerever, it is not sufficient to answer since y-z can be negative, in which case $$\mid y-z\mid =z-y$$
Statement 2: just states that y>z...nothing about x....

Combined, you can answer the question. Since y-z>0, $$\mid y-z\mid =y-z$$

hummm , thanks , i did not realize that I know nothing about x and 1st provide that relation

Agreed...C it is...was a good question
Re: Is x = |y - z|?   [#permalink] 29 Aug 2009, 12:01
Display posts from previous: Sort by