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

 It is currently 23 Oct 2019, 11:11

### 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

Math Expert
Joined: 02 Aug 2009
Posts: 8023

### Show Tags

17 Aug 2018, 23:47
00:00

Difficulty:

35% (medium)

Question Stats:

68% (00:42) correct 32% (00:37) wrong based on 63 sessions

### HideShow timer Statistics

Is x an integer?
(1) 7x is an integer
(2) x $$\neq{\frac{1}{7}}$$

New question!!!..

_________________
Senior Manager
Joined: 10 Jan 2013
Posts: 302
Location: India
Concentration: General Management, Strategy
GPA: 3.95
Re: Is x an integer?  [#permalink]

### Show Tags

17 Aug 2018, 23:53
1
Is x an integer?
(1) 7x is an integer
(2) x ≠17

Ok so i find these questions a bit tricky..

Here is my take-

1. As per this, if x =1/7.. then 7x is an integer but x is not an integer.

X can be 2 then 7x and x both are integer

NS

2. x=1/7

Ns as x can be anything but 1/7

Now combining...

What if x = -1/7

Then x is not an integer but 7x is integer

So E

Posted from my mobile device
Senior Manager
Joined: 14 Feb 2018
Posts: 387
Re: Is x an integer?  [#permalink]

### Show Tags

17 Aug 2018, 23:55
Statement 1 is clearly insufficient as x can assume a range of values.

Statement 2, is also insufficient, for the same reason. x = integer or any other fraction.

Combining statement 1 and 2, x can be an integer or any fraction again. Thus, both statements together are insufficient.

Hence, E.

Posted from my mobile device
VP
Status: Learning stage
Joined: 01 Oct 2017
Posts: 1011
WE: Supply Chain Management (Energy and Utilities)
Re: Is x an integer?  [#permalink]

### Show Tags

18 Aug 2018, 00:07
1
chetan2u wrote:
Is x an integer?
(1) 7x is an integer
(2) x $$\neq{\frac{1}{7}}$$

New question!!!..

Question stem:- Is x an integer?

St1:- 7x is an integer

Possibilities of x:- 'Integer(Such as -1,1,0 etc.), rational numbers(such as -1/7,1/7 etc or any number with 7 in denominator)
No unique value of x.
Insufficient.

St2:- x $$\neq{\frac{1}{7}}$$
Possibilities of x:- 'Integer(Such as -1,1,0 etc.), rational numbers(such as -1/2,1/2 etc except 1/7)
No unique value of x.
Insufficient.

Combined, x can be integers and fractions too.
Insufficient.

Ans. (E)
_________________
Regards,

PKN

Rise above the storm, you will find the sunshine
CR Forum Moderator
Joined: 25 Apr 2018
Posts: 638
GMAT 1: 680 Q49 V34

### Show Tags

18 Aug 2018, 01:54
chetan2u wrote:
Is x an integer?
(1) 7x is an integer
(2) x $$\neq{\frac{1}{7}}$$

New question!!!..

1=> x can be 2,3,4 etc meaning 7x is an integer so x is an integer
x can be 1/7, 2/7,3/7 etc meaning 7x is an integer so x is not an integer

1 is not sufficient

2 => x $$\neq{\frac{1}{7}}$$ x can be 2,3,4 or 2/7,3/7 etc

2 is not sufficent

Both 1 and 2 are insufficient

_________________

Project CR Butler - 2 CR's everyday
Manager
Joined: 16 May 2016
Posts: 199
Location: India
Schools: ESSEC '21 (A\$)
GMAT 1: 720 Q50 V38
GPA: 3.5
WE: Analyst (Consulting)
Re: Is x an integer?  [#permalink]

### Show Tags

19 Aug 2018, 00:30
1
chetan2u wrote:
Is x an integer?
(1) 7x is an integer
(2) x $$\neq{\frac{1}{7}}$$

New question!!!..

From 1:
X can be 1,2,3,4 or 1/7 or -(1/7)
Hence NS

From 2:
X is not 1/7 but X can be 1,2,3,-4,-5 or X can be -(1/7)
NS

1+2
NS

Ans: E
_________________
Not Giving UP! Kudos if you like the question
Re: Is x an integer?   [#permalink] 19 Aug 2018, 00:30
Display posts from previous: Sort by