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

It is currently 12 Dec 2018, 08:49

R1 Admission Decisions:

CMU Tepper in Calling R1 Admits   |  Kellogg Calls are Expected Shortly


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 in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
  • The winning strategy for 700+ on the GMAT

     December 13, 2018

     December 13, 2018

     08:00 AM PST

     09:00 AM PST

    What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.
  • GMATbuster's Weekly GMAT Quant Quiz, Tomorrow, Saturday at 9 AM PST

     December 14, 2018

     December 14, 2018

     09:00 AM PST

     10:00 AM PST

    10 Questions will be posted on the forum and we will post a reply in this Topic with a link to each question. There are prizes for the winners.

If w < x < y < z, is the product of four numbers negative?

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

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 51121
If w < x < y < z, is the product of four numbers negative?  [#permalink]

Show Tags

New post 10 Jun 2018, 04:06
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

75% (01:10) correct 25% (01:16) wrong based on 10 sessions

HideShow timer Statistics

Manager
Manager
avatar
B
Joined: 10 Jun 2018
Posts: 54
Location: Australia
Concentration: Technology, General Management
GPA: 2.88
WE: Science (Pharmaceuticals and Biotech)
Re: If w < x < y < z, is the product of four numbers negative?  [#permalink]

Show Tags

New post 10 Jun 2018, 04:19
(1) does not tell us anything. z is greater than 0, and the other three numbers could be smaller than 0. In which case the product of three negatives and one positive would be a negative number. However, y for example could also be greater than 0, in which case the product of two negatives and two positives would be a positive.

(2) however, tell us a lot. The product of w and x is less than 0, and thus one of those numbers must be negative, the other positive. Neither can be 0 because then the product can not be less than 0. Since w < x, x must be the positive number and w must be the negative number. Since y and z are both greater than x, both must be positive as well. The product of one negative and three positives is negative. Always. Thus (2) is sufficient.

Hence answer is B.
_________________

Not a professional entity or a quant/verbal expert or anything. So take my answers with a grain of salt.

GMAT Club Bot
Re: If w < x < y < z, is the product of four numbers negative? &nbs [#permalink] 10 Jun 2018, 04:19
Display posts from previous: Sort by

If w < x < y < z, is the product of four numbers negative?

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


Copyright

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®.