Summer is Coming! Join the Game of Timers Competition to Win Epic Prizes. Registration is Open. Game starts Mon July 1st.

 It is currently 22 Jul 2019, 00:46

### 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

# Is x an integer?

Author Message
TAGS:

### Hide Tags

Manager
Joined: 03 Jul 2012
Posts: 99
GMAT 1: 710 Q50 V36
GPA: 3.9
WE: Programming (Computer Software)

### Show Tags

08 Sep 2012, 06:01
5
9
00:00

Difficulty:

45% (medium)

Question Stats:

56% (00:55) correct 44% (01:02) wrong based on 299 sessions

### HideShow timer Statistics

Is x an integer?

(1) x³ is an integer
(2) ∛(x) is an integer

Can somebody explain why A is not sufficient?
Math Expert
Joined: 02 Sep 2009
Posts: 56317
Re: Is x an integer?  [#permalink]

### Show Tags

08 Sep 2012, 06:17
3
2
Is x an integer?

(1) x³ is an integer. If $$x=1$$, then the answer is YES but if $$x=\sqrt[3]{2}$$, then the answer is NO. no sufficient.

(2) ∛(x) is an integer --> $$\sqrt[3]{x}=integer$$ --> raise to the third power: $$x=integer^3=integer$$. Sufficient.

Hope it's clear.
_________________
##### General Discussion
Manager
Joined: 03 Jul 2012
Posts: 99
GMAT 1: 710 Q50 V36
GPA: 3.9
WE: Programming (Computer Software)
Re: Is x an integer?  [#permalink]

### Show Tags

08 Sep 2012, 06:29
1
Bunuel wrote:
Is x an integer?

(1) x³ is an integer. If $$x=1$$, then the answer is YES but if $$x=\sqrt[3]{2}$$, then the answer is NO. no sufficient.

(2) ∛(x) is an integer --> $$\sqrt[3]{x}=integer$$ --> raise to the third power: $$x=integer^3=integer$$. Sufficient.

Hope it's clear.

Yeah, its very clear . Thanks Bunuel.
Non-Human User
Joined: 09 Sep 2013
Posts: 11723
Re: Is x an integer?  [#permalink]

### Show Tags

18 Dec 2017, 14:27
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: Is x an integer?   [#permalink] 18 Dec 2017, 14:27
Display posts from previous: Sort by