It is currently 21 Oct 2017, 11:04

### 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

# What is the value of the integer n? (1) n(n + 2) = 15 (2) (n

Author Message
Manager
Joined: 03 Oct 2008
Posts: 61

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

What is the value of the integer n? (1) n(n + 2) = 15 (2) (n [#permalink]

### Show Tags

07 Oct 2008, 06:26
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

What is the value of the integer n?
(1) n(n + 2) = 15
(2) (n + 2)n = 125

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.

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

SVP
Joined: 05 Jul 2006
Posts: 1750

Kudos [?]: 431 [0], given: 49

### Show Tags

07 Oct 2008, 10:14
[quote="albany09"]What is the value of the integer n?
(1) n(n + 2) = 15
(2) (n + 2)n = 125

FROM ONE

15 = 5*3 OR 15*1

ONLY THE COMBINTATION 5,3 FITS IN THE FORM N(N+2) = 3(5).........

or -5, -3 ............inSUFF

FROM 2

I BELKEIVE THE GIVEN IS

(N+2)^N = 125 = 5^3......SUFF

b is the answer thanks for correcting me

Last edited by yezz on 07 Oct 2008, 16:24, edited 1 time in total.

Kudos [?]: 431 [0], given: 49

Intern
Joined: 02 Sep 2008
Posts: 45

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

### Show Tags

07 Oct 2008, 13:16
Hey..

As, (N+2) * N = 125 can not be possible. it should be (N+2) ^ N = 125.

and only one possible value which is 5.

While in case A,

for N = 3, 3 * 5 = 15 it is true and also

for N = -5, -5 * -3 = 15. it is also true so we have not unique answer.

That's why it is B.

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

Senior Manager
Joined: 29 Mar 2008
Posts: 348

Kudos [?]: 96 [0], given: 0

### Show Tags

07 Oct 2008, 13:23
What is the value of the integer n?
(1) n(n + 2) = 15
(2) (n + 2)n = 125

If the ST2 is correct, then it is (E)

(1) n can be 3 or -5
(2)Not sure any integer satisfies this.

As Twoon mentioned, if ST2 is (n+2)^2=125, then n=3 and hence suff (B).
_________________

To find what you seek in the road of life, the best proverb of all is that which says:
"Leave no stone unturned."
-Edward Bulwer Lytton

Kudos [?]: 96 [0], given: 0

Re: math--integer value   [#permalink] 07 Oct 2008, 13:23
Display posts from previous: Sort by