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

 It is currently 26 Oct 2016, 04:58

### 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

# Events & Promotions

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

# What is the value of (-1)^{g^4 + g - 1} ? 1. g is an integer

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Manager
Joined: 15 Nov 2007
Posts: 135
Followers: 1

Kudos [?]: 48 [0], given: 2

What is the value of (-1)^{g^4 + g - 1} ? 1. g is an integer [#permalink]

### Show Tags

18 Jan 2008, 00:34
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

What is the value of (-1)^{g^4 + g - 1} ?

1. g is an integer
2. g is even

* Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient
* Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient
* BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
* EACH statement ALONE is sufficient
* Statements (1) and (2) TOGETHER are NOT sufficient

i just get 2 is sufficient, OA is D. i keep seeing that pending it being even or odd, the result will be either -1 or 1. details would be nice =D.
CEO
Joined: 17 Nov 2007
Posts: 3589
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 519

Kudos [?]: 3328 [0], given: 360

Re: walker.... exponent question [#permalink]

### Show Tags

18 Jan 2008, 00:41

D

$$(-1)^{odd}=-1$$
$$(-1)^{even}=1$$

1. $$(-1)^{g^4 + g - 1}$$

a $$odd^4 + odd - 1 = odd$$
b $$even^4 + even - 1 = odd$$
SUFF.

2. $$(-1)^{g^4 + g - 1}$$
$$even^4 + even - 1 = odd$$
SUFF.
_________________

HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame

Manager
Joined: 15 Nov 2007
Posts: 135
Followers: 1

Kudos [?]: 48 [0], given: 2

Re: walker.... exponent question [#permalink]

### Show Tags

18 Jan 2008, 01:07
+1... question though: doesn't odd^4 = 4*odd (and hence, even) since it's an exponent raised to an exponent?
CEO
Joined: 17 Nov 2007
Posts: 3589
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 519

Kudos [?]: 3328 [0], given: 360

Re: walker.... exponent question [#permalink]

### Show Tags

18 Jan 2008, 01:23
dominion wrote:
+1... question though: doesn't odd^4 = 4*odd (and hence, even) since it's an exponent raised to an exponent?

$$1^4=1*1*1*1=1 (odd)$$
$$4*1=4 (even)$$
_________________

HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame

Director
Joined: 01 Jan 2008
Posts: 629
Followers: 5

Kudos [?]: 170 [0], given: 1

Re: walker.... exponent question [#permalink]

### Show Tags

18 Jan 2008, 07:52
the function is equal to -1 for any integer. Therefore, either of those statements is sufficient.
Re: walker.... exponent question   [#permalink] 18 Jan 2008, 07:52
Display posts from previous: Sort by

# What is the value of (-1)^{g^4 + g - 1} ? 1. g is an integer

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO 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®.