GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 19 Oct 2019, 02:59

### 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 y an integer? (1) y^3 is an integer (2) 3y is an integer

Author Message
TAGS:

### Hide Tags

Manager
Joined: 01 Nov 2017
Posts: 67
Location: India
Is y an integer? (1) y^3 is an integer (2) 3y is an integer  [#permalink]

### Show Tags

Updated on: 18 Feb 2019, 02:00
2
00:00

Difficulty:

55% (hard)

Question Stats:

33% (00:59) correct 67% (00:58) wrong based on 27 sessions

### HideShow timer Statistics

Is y an integer?

(1) y^3 is an integer
(2) 3y is an integer

Originally posted by raghavrf on 18 Feb 2019, 01:57.
Last edited by Bunuel on 18 Feb 2019, 02:00, edited 1 time in total.
Renamed the topic and edited the question.
CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2978
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Re: Is y an integer? (1) y^3 is an integer (2) 3y is an integer  [#permalink]

### Show Tags

18 Feb 2019, 05:20
raghavrf wrote:
Is y an integer?

(1) y^3 is an integer
(2) 3y is an integer

Question: Is y an Integer?

Statement 1: $$y^3$$is an integer

If $$y^3 = 1$$, y = 1 i.e. YES an Integer
If $$y^3 = 2$$, $$y = 2^{1/3}$$ i.e. NOT an Integer

NOT SUFFICIENT

Statement 2: $$3y$$is an integer

If $$3y = 1$$, y = 1/3 i.e. NOT an Integer
If $$3y = 3$$, $$y = 1$$ i.e. YES an Integer

NOT SUFFICIENT

Combining the two statements

$$y^3$$ is an Integer i.e. y is definitely not a fraction
and $$3y$$ is an Integer

i.e. y must be an Integer

Sufficient

Answetr: Option C
_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
Re: Is y an integer? (1) y^3 is an integer (2) 3y is an integer   [#permalink] 18 Feb 2019, 05:20
Display posts from previous: Sort by