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

 It is currently 03 May 2015, 20:42

### 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

# K does not equal 0, 1, or -1. Is 1/k > 0? 1) 1/k - 1 >

Author Message
TAGS:
Senior Manager
Joined: 07 Feb 2008
Posts: 315
Followers: 1

Kudos [?]: 60 [0], given: 1

K does not equal 0, 1, or -1. Is 1/k > 0? 1) 1/k - 1 > [#permalink]  15 Jun 2008, 11:35
K does not equal 0, 1, or -1. Is 1/k > 0?
1) 1/k - 1 > 0
2) 1/k + 1 > 0
Director
Joined: 14 Oct 2007
Posts: 759
Location: Oxford
Schools: Oxford'10
Followers: 13

Kudos [?]: 183 [0], given: 8

Re: Is K what I think it is ? [#permalink]  15 Jun 2008, 12:49
Vavali wrote:
K does not equal 0, 1, or -1. Is 1/k > 0?
1) 1/k - 1 > 0
2) 1/k + 1 > 0

is 1) saying (1/k) - 1 or 1/(k-1) ??

need to sort out those braces varvali
Senior Manager
Joined: 07 Feb 2008
Posts: 315
Followers: 1

Kudos [?]: 60 [0], given: 1

Re: Is K what I think it is ? [#permalink]  15 Jun 2008, 13:21
Vavali wrote:
K does not equal 0, 1, or -1. Is 1/k > 0?
1) 1/k - 1 > 0
2) 1/k + 1 > 0

is 1) saying (1/k) - 1 or 1/(k-1) ??

need to sort out those braces varvali

Apologies,

1) 1/(k - 1) > 0
2) 1/(k + 1) > 0
Director
Joined: 12 Apr 2008
Posts: 500
Location: Eastern Europe
Schools: Oxford
Followers: 12

Kudos [?]: 176 [0], given: 4

Re: Is K what I think it is ? [#permalink]  15 Jun 2008, 15:32
1) 1/(k - 1) > 0
From here it follows (k-1)>0 and thus k>1 so 1/k will be > 0 => sufficient

2) 1/(k + 1) > 0
Insuff. k > -1 gives us nothing. If k=-0.5 => 1/k=-2 which is obviously < 0; if k=0.5 1/k=2 > 0.

Thus, A.
Intern
Joined: 06 Aug 2007
Posts: 38
Followers: 0

Kudos [?]: 3 [0], given: 0

Re: Is K what I think it is ? [#permalink]  15 Jun 2008, 18:11
I get D!

1. 1/(K-1) > 0

The above inequality says (K-1) = +ve, and K is not equal to -1,0,+1, so K>1

A is sufficient

2. 1/(K+1) > 0

The above inequality says (K+1) = +ve, and K is not equal to -1,0,+1, so K>1

B is sufficient

Director
Joined: 14 Aug 2007
Posts: 734
Followers: 8

Kudos [?]: 118 [0], given: 0

Re: Is K what I think it is ? [#permalink]  15 Jun 2008, 18:23
Vavali wrote:
Vavali wrote:
K does not equal 0, 1, or -1. Is 1/k > 0?
1) 1/k - 1 > 0
2) 1/k + 1 > 0

is 1) saying (1/k) - 1 or 1/(k-1) ??

need to sort out those braces varvali

Apologies,

1) 1/(k - 1) > 0
2) 1/(k + 1) > 0

A.

1)k-1> 0; k>1 ; with given conditions, sufficient.
2)k+1> 0; k>-1; K can have values between 0>k>-1 making it insuff
Senior Manager
Joined: 26 Mar 2008
Posts: 341
Location: Washington DC
Followers: 2

Kudos [?]: 40 [0], given: 4

Re: Is K what I think it is ? [#permalink]  15 Jun 2008, 18:32
Kalyan wrote:
I get D!

1. 1/(K-1) > 0

The above inequality says (K-1) = +ve, and K is not equal to -1,0,+1, so K>1

A is sufficient

2. 1/(K+1) > 0

The above inequality says (K+1) = +ve, and K is not equal to -1,0,+1, so K>1

B is sufficient

question doesnt say that K is an integer so K can assume any values. Hence A.
Senior Manager
Joined: 07 Feb 2008
Posts: 315
Followers: 1

Kudos [?]: 60 [0], given: 1

Re: Is K what I think it is ? [#permalink]  15 Jun 2008, 23:45
The OA is A. Thanks guys
Re: Is K what I think it is ?   [#permalink] 15 Jun 2008, 23:45
Similar topics Replies Last post
Similar
Topics:
2 If k does not equal 0, 1 or -1, is 1/k >0 (1) 1/(k-1) > 0 9 24 Aug 2011, 10:24
If k not equal 0, 1, or -1, is 1/k >0 1) 1/(k-1) > 0 2 13 Sep 2009, 14:52
Q1. If K is not equal to 0,1,-1, is 1/k > 0 ? (1) 1/(k-1) 4 09 Dec 2007, 18:35
If K is not equal to 1, 0 or -1 , is 1/k>0 1) 1/k-1>0 3 20 Nov 2006, 19:26
1 If K does not equal 0, 1 or -1, is 1/k > 0? 1) 1/k-1 5 19 Apr 2006, 20:34
Display posts from previous: Sort by