Last visit was: 30 Dec 2024, 09:12 It is currently 30 Dec 2024, 09:12
Decision Tracker
My Rewards
New comers' posts
New posts
Unanswered

Close

GRE Prep 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 GRE 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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel
PREVIOUS TOPIC
NEXT TOPIC

ab > 0 and bc < 0

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

User avatar
sandy
Retired Moderator
Joined: 07 Jun 2014
Posts: 4815
Own Kudos [?]: 11278 [2]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
ab > 0 and bc < 0 [#permalink] New post   30 Aug 2018, 16:32
1
Expert Reply
1
Bookmarks
00:00

Question Stats:

61% (00:46) correct 38% (00:39) wrong based on 169 sessions

Hide Show timer Statistics

\(ab > 0\)
\(bc < 0\)

Quantity A
Quantity B
\(ac\)
\(0\)


A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
ShowHide Answer
Official Answer
B
avatar
IshanGre
Manager
Manager
Joined: 29 Nov 2017
Posts: 190
Own Kudos [?]: 135 [0]
Given Kudos: 0
Location: United States
GRE 1: Q142 V146
WE:Information Technology (Computer Software)
Send PM
Re: ab > 0 and bc < 0 [#permalink] New post   01 Sep 2018, 07:26
Because C is negative hence the option is B.
avatar
akashjain0802
Intern
Intern
Joined: 02 Jul 2018
Posts: 9
Own Kudos [?]: 18 [2]
Given Kudos: 0
Send PM
Re: ab > 0 and bc < 0 [#permalink] New post   02 Sep 2018, 02:59
2
Given:

ab>0. This implies both a and b are of same sign
bc < 0. This implies both b and c are opposite sign

Following matrix can be created based on information given:

a b c
- - +
+ + -

clearly from the matrix above both a and c are always opposite signs; meaning their product will be always negative or ac < 0

hence answer quantity B is bigger. Answer choice B
User avatar
Mari
Intern
Intern
Joined: 07 May 2020
Posts: 20
Own Kudos [?]: 19 [0]
Given Kudos: 0
Send PM
Re: ab > 0 and bc < 0 [#permalink] New post   21 Jun 2020, 07:37
draw a table and you will see the answer:

According to the premise signs of variables are defined as follows:

A (1) - or (2) +

B (1) - or (2) +

C (1) + or (2) -

Obviously multiplication of a*c in either case gives us a negative number, which is less than Zero
avatar
Sanyam2020
Intern
Intern
Joined: 30 May 2020
Posts: 8
Own Kudos [?]: 6 [0]
Given Kudos: 0
Send PM
Re: ab > 0 and bc < 0 [#permalink] New post   26 Jun 2020, 18:29
a * b > 0
b * c < 0

multiply equations. = a * b^2 * c < 0
b^2 > 0
= > a *c < 0
avatar
georgekaterji
Intern
Intern
Joined: 23 May 2020
Posts: 14
Own Kudos [?]: 15 [2]
Given Kudos: 0
Send PM
Re: ab > 0 and bc < 0 [#permalink] New post   28 Jun 2020, 04:32
2
IshanGre wrote:
Because C is negative hence the option is B.


C is not necessarily negative

but the trick here is that c and a will definitly have opposite signs

ab>0:

a positive and b positive or a negative and b negative

bc<0:

b is negative and c is positive or b ispoisitive and c is negative

since b and a have the same signs, and b and c have opposite signs, then definitely a and c will have opposite signs
avatar
B
iASindia
Intern
Intern
Joined: 11 Jun 2022
Posts: 38
Own Kudos [?]: 25 [0]
Given Kudos: 187
Send PM
Re: ab > 0 and bc < 0 [#permalink] New post   27 Aug 2022, 04:12
Carcass could you please add the OA as B considering Option A will always be negative so Option B > Option A.
User avatar
D
Carcass
Verbal Expert
Joined: 18 Apr 2015
Posts: 30555
Own Kudos [?]: 36906 [0]
Given Kudos: 26108
Send PM
ab > 0 and bc < 0 [#permalink] New post   27 Aug 2022, 04:23
Expert Reply
iASindia wrote:
Carcass could you please add the OA as B considering Option A will always be negative so Option B > Option A.


The OA is already B stated under the spoiler

ab>0

a and b are both positive or negative

bc >0

Now is the above ab>0 b is negative a is negative as well. And b is negative and C MUST be positive


IF

ab is both positive

then

b is positive and c must be negative

In the first scenario we do have a negative and c positive so a*c is negative and <0

In the second a is positive and c is negative and a*c is negative

The answer is B
Prep Club for GRE Bot
gmatclubot
ab > 0 and bc < 0 [#permalink]
27 Aug 2022, 04:23
Moderators:
adewale223
GRE Instructor
88 posts
bronaugust
GRE Forum Moderator
37 posts
BrushMyQuant
Moderator
1116 posts
VibhuAnurag
GRE Instructor
234 posts

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

Main navigation

Partners

GRE Resources

www.ets.org/gre | About | Terms and Conditions and Privacy Policy | Prep Club for GRE Rules | Contact