It is currently 17 Oct 2017, 15:29

### 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

# If z^n=1, what is the value of z? 1. n is a nonzero integer

Author Message
Current Student
Joined: 29 Jan 2005
Posts: 5207

Kudos [?]: 434 [0], given: 0

If z^n=1, what is the value of z? 1. n is a nonzero integer [#permalink]

### Show Tags

22 Aug 2006, 06:09
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.

If z^n=1, what is the value of z?

1. n is a nonzero integer
2. z>0

Edited for clarity Thanx Gmatornot! Sorry for the confusion.

Last edited by GMATT73 on 22 Aug 2006, 08:30, edited 2 times in total.

Kudos [?]: 434 [0], given: 0

VP
Joined: 29 Dec 2005
Posts: 1339

Kudos [?]: 69 [0], given: 0

### Show Tags

22 Aug 2006, 06:18
GMATT73 wrote:
If z^n=1, what is the value of z?

1. z is a nonzero integer
2. z>0

1. z could be -1, or 1 with n is not equal to 0. z could also be 2 with n=0.
2. z could be 1 (n=1,2,3,4,5,6.............), 2 (n=0), 3(n=0), 4(n=0), 5(n=0) and so on..

so E.

Kudos [?]: 69 [0], given: 0

Current Student
Joined: 29 Jan 2005
Posts: 5207

Kudos [?]: 434 [0], given: 0

### Show Tags

22 Aug 2006, 06:36
Professor wrote:
GMATT73 wrote:
If z^n=1, what is the value of z?

1. z is a nonzero integer
2. z>0

1. z could be -1, or 1 with n is not equal to 0. z could also be 2 with n=0.
2. z could be 1 (n=1,2,3,4,5,6.............), 2 (n=0), 3(n=0), 4(n=0), 5(n=0) and so on..

so E.

Looks like you overlooked a step professor.

Kudos [?]: 434 [0], given: 0

Current Student
Joined: 28 Dec 2004
Posts: 3351

Kudos [?]: 319 [0], given: 2

Location: New York City
Schools: Wharton'11 HBS'12

### Show Tags

22 Aug 2006, 07:17
this is E...

we dont know what n is, if n=0...then any value z will yield a 1...

Kudos [?]: 319 [0], given: 2

Current Student
Joined: 29 Jan 2005
Posts: 5207

Kudos [?]: 434 [0], given: 0

### Show Tags

22 Aug 2006, 07:20
fresinha12 wrote:
this is E...

we dont know what n is, if n=0...then any value z will yield a 1...

The OA and OE from the OG11 doesn`t see it that way...

Kudos [?]: 434 [0], given: 0

Current Student
Joined: 29 Jan 2005
Posts: 5207

Kudos [?]: 434 [0], given: 0

### Show Tags

22 Aug 2006, 08:25
fresinha12 wrote:
just what does OG 11 say?

GMATT73 wrote:
fresinha12 wrote:
this is E...

we dont know what n is, if n=0...then any value z will yield a 1...

The OA and OE from the OG11 doesn`t see it that way...

OE Ver batem from the OG:

(1) From this it is known that n is a non-zero integer, and since z^n=1, it follows that z is either 1 or -1...... NOT sufficient.

(2) While it is known from this that z is positive, if n were 0, any positive value of z would satisfy z^n = 1... NOT sufficient

Taken together limits z to 1.

(C)

Trixy eh? I finally got it after keying in the OE..

Kudos [?]: 434 [0], given: 0

Senior Manager
Joined: 14 Jul 2005
Posts: 401

Kudos [?]: 31 [0], given: 0

### Show Tags

22 Aug 2006, 08:26
There is a typo here...

If z^n=1, what is the value of z?

1. z should be n is a nonzero integer
2. z>0

Q126 page 288

Kudos [?]: 31 [0], given: 0

VP
Joined: 29 Dec 2005
Posts: 1339

Kudos [?]: 69 [0], given: 0

### Show Tags

22 Aug 2006, 11:42
gmatornot wrote:
There is a typo here...

If z^n=1, what is the value of z?

1. z should be n is a nonzero integer
2. z>0

Q126 page 288

nowdays we are getting more questions with typos.

one more here too: http://www.gmatclub.com/phpbb/viewtopic ... ht=#232035

GMATT73 wrote:
If z^n=1, what is the value of z?

1. n is a nonzero integer
2. z>0

Edited for clarity Thanx Gmatornot! Sorry for the confusion.

Kudos [?]: 69 [0], given: 0

Senior Manager
Joined: 14 Jul 2005
Posts: 401

Kudos [?]: 31 [0], given: 0

### Show Tags

22 Aug 2006, 11:44
No problem GMATT73 .. looks like you are really studying hard for the test ! Hope you crack it....

Kudos [?]: 31 [0], given: 0

Current Student
Joined: 29 Jan 2005
Posts: 5207

Kudos [?]: 434 [0], given: 0

### Show Tags

22 Aug 2006, 20:20
gmatornot wrote:
No problem GMATT73 .. looks like you are really studying hard for the test ! Hope you crack it....

Thanks for the encouragement gmatornot. Actually, all I want to do is break a 600. No super high expectations because I am not a wizard at Q. Just been consistently doing problems from this website and textbooks (OG and Kaplan) while making/reviewing a categorized error log. My last score was a 590 (Q40 V30), not quite enough to get into my target school (600 mean) so it`s time to fight for that last inch! See you in the forum.

Matt

Kudos [?]: 434 [0], given: 0

22 Aug 2006, 20:20
Display posts from previous: Sort by