Is X to the power 3 an odd integer? (1) 3 square root X is : DS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 21 Jan 2017, 17:20

### 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

# Is X to the power 3 an odd integer? (1) 3 square root X is

Author Message
SVP
Joined: 05 Apr 2005
Posts: 1731
Followers: 5

Kudos [?]: 74 [0], given: 0

Is X to the power 3 an odd integer? (1) 3 square root X is [#permalink]

### Show Tags

12 Oct 2005, 20:22
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.

Is X to the power 3 an odd integer?

(1) 3 square root X is an odd integer.
(2) X is an odd integer.
VP
Joined: 22 Aug 2005
Posts: 1120
Location: CA
Followers: 1

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

### Show Tags

12 Oct 2005, 20:30
D.

(1) 3 sqrt(x) = odd
sqrt(x) = odd / 3 = odd,
x is off
x^3 = odd

(2)
odd ^ n = odd, n >= 0

Last edited by duttsit on 12 Oct 2005, 20:32, edited 1 time in total.
Director
Joined: 21 Aug 2005
Posts: 793
Followers: 2

Kudos [?]: 24 [0], given: 0

### Show Tags

12 Oct 2005, 20:30
D

x^3 is odd when x is odd.

a) Suff. 3*sqrt(x) = odd => 9*x = odd. So x has to be odd.
b) Given x is odd. So suff.
VP
Joined: 22 Aug 2005
Posts: 1120
Location: CA
Followers: 1

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

### Show Tags

12 Oct 2005, 21:04
HIMALAYA wrote:
i like this....

Well, I started with B, then moved to D.
I guess B is right.
(1) 3 * sqrt(1/9) = 1 = odd

but 1/9 ^ 3 is not odd
Senior Manager
Joined: 02 Oct 2005
Posts: 297
Followers: 1

Kudos [?]: 21 [0], given: 0

### Show Tags

12 Oct 2005, 21:58
Ans: B

1) This could lead to fraction as stated above by duttsit. If I remember right, fraction numbers are not considered to be odd or even. Please correct me if I am wrong

2) Suff: Multiplication property of number. odd * odd = odd

Btw, what is OA and explanation?
Current Student
Joined: 29 Jan 2005
Posts: 5238
Followers: 25

Kudos [?]: 377 [0], given: 0

### Show Tags

12 Oct 2005, 23:27
If the first statement reads the cubed root of X = then answer is D.

If the first statement reads 3 times the sqrt X = then answer is B.
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5062
Location: Singapore
Followers: 30

Kudos [?]: 358 [0], given: 0

### Show Tags

13 Oct 2005, 00:43
x^3 = odd? Or X * X * X = odd?

In order for this to happen, X must be odd.

From 1, 3 * X^1/2 = odd. This means X^1/2 is odd. So X^1/2 * X^1/2 = odd * odd = odd. Statement 1 is sufficient.

From 2, X is odd. So statement 2 is sufficient.

SVP
Joined: 05 Apr 2005
Posts: 1731
Followers: 5

Kudos [?]: 74 [0], given: 0

### Show Tags

13 Oct 2005, 17:00
duttsit wrote:
HIMALAYA wrote:
i like this....

Well, I started with B, then moved to D. I guess B is right.
(1) 3 * sqrt(1/9) = 1 = odd, but 1/9 ^ 3 is not odd

OA is B.
i) If x is an odd integer, then X^3 is odd integer. but, if x = 1/9, then X^3 is (1/3)^3 or 1/27, which is not even an integer. so not suff...
ii) it is clearly suff.
So B is correct..
13 Oct 2005, 17:00
Display posts from previous: Sort by