What is the value of Z? 1) z^2 =49 2) z< 1/z : DS Archive
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# What is the value of Z? 1) z^2 =49 2) z< 1/z

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What is the value of Z? 1) z^2 =49 2) z< 1/z [#permalink]

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15 Nov 2005, 19:55
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What is the value of Z?

1) z^2 =49

2) z< 1/z
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15 Nov 2005, 20:29
I believe it's C
z^2< 49
ok, that tells me that z is positive or negative 7, insufficient

z < 1/z

the only way this would happen is if z is a fraction or z is a negative number....but it could be any of the numbers that fit this criteria, insufficient

Both Combined works- -7 is the only number that meets both critieria...think of a number line....-7 is way lower (further to the left than -1/7 is)
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15 Nov 2005, 20:34
stmt 1) z = +/- 7 not suff
stmt 2) 1/z > z is possible if z is any proper fraction or if z is any negative integer less than -1. Not suff

1) & 2) we get -7 --> only number for which 1 and 2 holds

C it is
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15 Nov 2005, 23:15
-7 is less than -1/7.

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16 Nov 2005, 14:02
E

What is the value of Z?

1) z^2 =49

z = 7 or -7 Insuff

2) z< 1/z

there are lots of values which statisfy this so Insuff

taking together ....proves that 49<1 wrong ....

hence E
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16 Nov 2005, 14:11
this is another 200 level question..that kaplan sells as a 600+...LOL...

it should be C...
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16 Nov 2005, 14:52
cool_jonny009 wrote:
E

What is the value of Z?

1) z^2 =49

z = 7 or -7 Insuff

2) z< 1/z

there are lots of values which statisfy this so Insuff

taking together ....proves that 49<1 wrong ....

hence E

if z < 1/z we cannot say z^2 < 1, what id z is -ve?
_________________

Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)

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16 Nov 2005, 16:49
Quote:

thanx duttsit .....for pointing out my wrong assumption ..
Appreciate it
16 Nov 2005, 16:49
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The text passage provided is a GMAT question from the Data Sufficiency (DS) section. It asks for the value of \( z \) and provides two statements to determine if the value can be found.

1. The passage contains a mathematical question.
2. No answer to the mathematical question is provided in the text.

**Content Structure:**
- The passage is a GMAT Data Sufficiency question.
- It provides two statements to determine the value of \( z \).

**Analysis:**
single_question
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
What is the value of Z? 1) z^2 =49 2) z< 1/z : DS Archive
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# What is the value of Z? 1) z^2 =49 2) z< 1/z

Author Message
Director
Joined: 17 Oct 2005
Posts: 932
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Kudos [?]: 201 [0], given: 0

What is the value of Z? 1) z^2 =49 2) z< 1/z [#permalink]

### Show Tags

15 Nov 2005, 19:55
00:00

Difficulty:

(N/A)

Question Stats:

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

### HideShow timer Statistics

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

What is the value of Z?

1) z^2 =49

2) z< 1/z
Manager
Joined: 19 Sep 2005
Posts: 110
Followers: 1

Kudos [?]: 11 [0], given: 0

### Show Tags

15 Nov 2005, 20:29
I believe it's C
z^2< 49
ok, that tells me that z is positive or negative 7, insufficient

z < 1/z

the only way this would happen is if z is a fraction or z is a negative number....but it could be any of the numbers that fit this criteria, insufficient

Both Combined works- -7 is the only number that meets both critieria...think of a number line....-7 is way lower (further to the left than -1/7 is)
Intern
Joined: 01 Jun 2005
Posts: 40
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15 Nov 2005, 20:34
stmt 1) z = +/- 7 not suff
stmt 2) 1/z > z is possible if z is any proper fraction or if z is any negative integer less than -1. Not suff

1) & 2) we get -7 --> only number for which 1 and 2 holds

C it is
Current Student
Joined: 29 Jan 2005
Posts: 5238
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15 Nov 2005, 23:15
-7 is less than -1/7.

Director
Joined: 27 Jun 2005
Posts: 506
Location: MS
Followers: 3

Kudos [?]: 108 [0], given: 0

### Show Tags

16 Nov 2005, 14:02
E

What is the value of Z?

1) z^2 =49

z = 7 or -7 Insuff

2) z< 1/z

there are lots of values which statisfy this so Insuff

taking together ....proves that 49<1 wrong ....

hence E
Current Student
Joined: 28 Dec 2004
Posts: 3384
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 15

Kudos [?]: 282 [0], given: 2

### Show Tags

16 Nov 2005, 14:11
this is another 200 level question..that kaplan sells as a 600+...LOL...

it should be C...
VP
Joined: 22 Aug 2005
Posts: 1120
Location: CA
Followers: 1

Kudos [?]: 102 [0], given: 0

### Show Tags

16 Nov 2005, 14:52
cool_jonny009 wrote:
E

What is the value of Z?

1) z^2 =49

z = 7 or -7 Insuff

2) z< 1/z

there are lots of values which statisfy this so Insuff

taking together ....proves that 49<1 wrong ....

hence E

if z < 1/z we cannot say z^2 < 1, what id z is -ve?
_________________

Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)

Director
Joined: 27 Jun 2005
Posts: 506
Location: MS
Followers: 3

Kudos [?]: 108 [0], given: 0

### Show Tags

16 Nov 2005, 16:49
Quote:

thanx duttsit .....for pointing out my wrong assumption ..
Appreciate it
16 Nov 2005, 16:49
Display posts from previous: Sort by
user
The text passage provided is a GMAT question from the Data Sufficiency (DS) section. It asks for the value of \( z \) and provides two statements to determine if the value can be found.

1. The passage contains a mathematical question.
2. No answer to the mathematical question is provided in the text.

**Content Structure:**
- The passage is a GMAT Data Sufficiency question.
- It provides two statements to determine the value of \( z \).

**Analysis:**
TYPE: SINGLE_QUESTION