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

It is currently 21 Jun 2018, 12:55

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Is xy > 6 ? (1) 2 ≤ x ≤ 4 , 3 < y < 5 (2) x – y = 0

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
1 KUDOS received
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 46264
Is xy > 6 ? (1) 2 ≤ x ≤ 4 , 3 < y < 5 (2) x – y = 0 [#permalink]

Show Tags

New post 06 Feb 2017, 07:48
1
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

80% (00:56) correct 20% (00:48) wrong based on 118 sessions

HideShow timer Statistics

Expert Post
Top Contributor
CEO
CEO
User avatar
P
Joined: 12 Sep 2015
Posts: 2567
Location: Canada
Is xy > 6 ? (1) 2 ≤ x ≤ 4 , 3 < y < 5 (2) x – y = 0 [#permalink]

Show Tags

New post Updated on: 10 Feb 2017, 09:02
Top Contributor
Bunuel wrote:
Is xy > 6 ?

(1) 2 ≤ x ≤ 4 , 3 < y < 5
(2) x – y = 0


Target question: Is xy > 6 ?

Statement 1: 2 ≤ x ≤ 4 , 3 < y < 5
The LEAST possible value of x is 2.
If it were possible for y to equal 3, then xy = (2)(3) = 6
However, it is NOT possible for y to equal 3, since the statement tells us that y is GREATER THAN 3.
So, the least possible value of xy must be greater than 6.
So, we can be certain that xy > 6
Since we can answer the target question with certainty, statement 1 is SUFFICIENT

Statement 2: x – y = 0
There are several values of x and y that satisfy statement 2. Here are two:
Case a: x = 3 and y = 3, in which case xy = (3)(3) = 9. In this case, xy IS greater than 6
Case b: x = 1 and y = 1, in which case xy = (1)(1) = 1. In this case, xy is NOT greater than 6
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT

Answer: A

Cheers,
Brent
_________________

Brent Hanneson – Founder of gmatprepnow.com

Image


Originally posted by GMATPrepNow on 06 Feb 2017, 11:06.
Last edited by GMATPrepNow on 10 Feb 2017, 09:02, edited 1 time in total.
1 KUDOS received
Intern
Intern
avatar
B
Joined: 02 Dec 2015
Posts: 9
Location: Denmark
GMAT 1: 690 Q49 V35
GPA: 3
GMAT ToolKit User Premium Member
Re: Is xy > 6 ? (1) 2 ≤ x ≤ 4 , 3 < y < 5 (2) x – y = 0 [#permalink]

Show Tags

New post 06 Feb 2017, 12:26
1
To me answer A makes the most sense.
I also assumed that GMATPrepNow meant A, not be. Correct me if I am wrong :)
1 KUDOS received
SVP
SVP
User avatar
P
Joined: 26 Mar 2013
Posts: 1676
Reviews Badge CAT Tests
Re: Is xy > 6 ? (1) 2 ≤ x ≤ 4 , 3 < y < 5 (2) x – y = 0 [#permalink]

Show Tags

New post 07 Feb 2017, 03:33
1
GMATPrepNow wrote:
Bunuel wrote:
Is xy > 6 ?

(1) 2 ≤ x ≤ 4 , 3 < y < 5
(2) x – y = 0


Target question: Is xy > 6 ?

Statement 1: 2 ≤ x ≤ 4 , 3 < y < 5
The LEAST possible value of x is 2.
If it were possible for y to equal 3, then xy = (2)(3) = 6
However, it is NOT possible for y to equal 3, since the statement tells us that y is GREATER THAN 3.
So, the least possible value of xy must be greater than 6.
So, we can be certain that xy > 6
Since we can answer the target question with certainty, statement 1 is SUFFICIENT

Statement 2: x – y = 0
There are several values of x and y that satisfy statement 2. Here are two:
Case a: x = 3 and y = 3, in which case xy = (3)(3) = 9. In this case, xy IS greater than 6
Case b: x = 1 and y = 1, in which case xy = (1)(1) = 1. In this case, xy is NOT greater than 6
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT

Answer: B

Cheers,
Brent


Dear Brent,

There is a typo.

While you proved that statement 1 SUFFICIENT, you marked the answer B. It should be A.
Senior Manager
Senior Manager
avatar
G
Joined: 29 Oct 2016
Posts: 254
Concentration: Finance, Economics
GMAT 1: 620 Q50 V24
GRE 1: 314 Q167 V147
Is xy > 6 ? (1) 2 ≤ x ≤ 4 , 3 < y < 5 (2) x – y = 0 [#permalink]

Show Tags

New post 10 Feb 2017, 08:55
Bunuel wrote:
Is xy > 6 ?

(1) 2 ≤ x ≤ 4 , 3 < y < 5
(2) x – y = 0


Should be A

(1) the least value of x is 2.We know that y is greater than 3;hence xy is for sure greater than 6 : SUFFICIENT
(2) x=y;xy could be from x=y=2 or x=y=3 : INSUFFICIENT
Expert Post
Top Contributor
CEO
CEO
User avatar
P
Joined: 12 Sep 2015
Posts: 2567
Location: Canada
Re: Is xy > 6 ? (1) 2 ≤ x ≤ 4 , 3 < y < 5 (2) x – y = 0 [#permalink]

Show Tags

New post 10 Feb 2017, 09:03
Top Contributor
Xavipersonal wrote:
To me answer A makes the most sense.
I also assumed that GMATPrepNow meant A, not be. Correct me if I am wrong :)


Thanks for pointing that out. I have changed B to A

Cheers,
Brent
_________________

Brent Hanneson – Founder of gmatprepnow.com

Image

Re: Is xy > 6 ? (1) 2 ≤ x ≤ 4 , 3 < y < 5 (2) x – y = 0   [#permalink] 10 Feb 2017, 09:03
Display posts from previous: Sort by

Is xy > 6 ? (1) 2 ≤ x ≤ 4 , 3 < y < 5 (2) x – y = 0

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.