It is currently 23 Mar 2018, 06:05

### 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

# if x^2+5y=49, is y an integer? 1) 1<x<4 2) x^2 is an

Author Message
Intern
Joined: 22 Jul 2008
Posts: 42
if x^2+5y=49, is y an integer? 1) 1<x<4 2) x^2 is an [#permalink]

### Show Tags

06 Sep 2008, 12:25
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

if x^2+5y=49, is y an integer?
1) 1<x<4
2) x^2 is an integer

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Director
Joined: 12 Jul 2008
Posts: 513
Schools: Wharton

### Show Tags

06 Sep 2008, 13:38
rnemani wrote:
if x^2+5y=49, is y an integer?
1) 1<x<4
2) x^2 is an integer

E

If y is an integer, then (49-x^2)/5 must be an integer

(1) Insufficient
x may not be an integer

(2) Insufficient
x^2 can be any integer.

(1) and (2) Insufficient
If 1 < x < 4 and x^2 is an integer, then x^2 is any integer between 1 and 16, noninclusive

For example:
x = sqrt(2)
x^2 = 2
(49-x^2)/5 = 47/5

OR

x = 2
x^2 = 4
(49-x^2)/5 = 45/5
VP
Joined: 05 Jul 2008
Posts: 1368

### Show Tags

06 Sep 2008, 16:53
rnemani wrote:
if x^2+5y=49, is y an integer?
1) 1<x<4

x = 2 Y = 44/9 (not Int)

x=3 y = 40/5 = 8 ( int )

Insuff

2) x^2 is an integer

x2 =4 Y!= Int

x2=9 Y = int

Insuff

I do not se

combine both, same values satisfy both conditions. Hence E
Manager
Joined: 11 Apr 2008
Posts: 198

### Show Tags

06 Sep 2008, 17:31
I agree with zoinnk
The ans is E.
What is OA?

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

Nobody dies a virgin, life screws us all.

Re: DS Question   [#permalink] 06 Sep 2008, 17:31
Display posts from previous: Sort by