Last visit was: 22 Dec 2024, 14:08 It is currently 22 Dec 2024, 14:08
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

abcd is different from zero

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

User avatar
D
Carcass
Verbal Expert
Joined: 18 Apr 2015
Posts: 30472
Own Kudos [?]: 36818 [5]
Given Kudos: 26100
Send PM
abcd is different from zero [#permalink] New post   03 Aug 2020, 14:50
Expert Reply
5
Bookmarks
00:00

Question Stats:

54% (01:38) correct 45% (01:22) wrong based on 198 sessions

Hide Show timer Statistics

\(abcd \neq 0\)

\(ad > bc\)

\(bd < 0\)


Quantity A
Quantity B
\(\frac{b}{a}\)
\( \frac{d}{c} \)




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
D
avatar
Aaka
Manager
Manager
Joined: 19 Jan 2020
Posts: 56
Own Kudos [?]: 67 [3]
Given Kudos: 0
Send PM
Re: abcd is different from zero [#permalink] New post   04 Aug 2020, 05:07
3
Nothing about a and c. They can be negative or positive because...
We are not sure about the exact signs of b and d...we just know they have opposite signs.
Answer: D
avatar
Ezio23
Intern
Intern
Joined: 26 Jan 2020
Posts: 38
Own Kudos [?]: 35 [3]
Given Kudos: 0
Send PM
Re: abcd is different from zero [#permalink] New post   29 Oct 2020, 02:14
3
Subtracting d/c on both the sides:
Quantity A:
b/a-d/c
Quantity B:
0

Taking LCM for Quantity A, we get: bc-ad/ac........................[1]

Also given that ad>bc
=> ad-bc>0 or bc-ad<0.................................[2]

comparing 1 and 2, we have no idea whether ac > 0 or ac <0

Quantity A could be >0 or <0
Quantity B is ZERO (as shown above)

Pick choice D
avatar
S
COolguy101
Senior Manager
Senior Manager
Joined: 23 Jan 2021
Posts: 294
Own Kudos [?]: 172 [2]
Given Kudos: 81
Concentration: , International Business
Send PM
Re: abcd is different from zero [#permalink] New post   25 May 2021, 23:14
2
Carcass wrote:
\(abcd \neq 0\)

\(ad > bc\)

\(bd < 0\)


Quantity A
Quantity B
\(\frac{b}{a}\)
\( \frac{d}{c} \)




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.



After rearranging answer choice we get ad in one quantity and bc in another quantity, But we are clear said that ad > bc , Thus quantity B must be greater. Carcass sir!
User avatar
D
Carcass
Verbal Expert
Joined: 18 Apr 2015
Posts: 30472
Own Kudos [?]: 36818 [0]
Given Kudos: 26100
Send PM
Re: abcd is different from zero [#permalink] New post   26 May 2021, 01:01
Expert Reply
kumarneupane4344 wrote:
Carcass wrote:
\(abcd \neq 0\)

\(ad > bc\)

\(bd < 0\)


Quantity A
Quantity B
\(\frac{b}{a}\)
\( \frac{d}{c} \)




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.



After rearranging answer choice we get ad in one quantity and bc in another quantity, But we are clear said that ad > bc , Thus quantity B must be greater. Carcass sir!



But you do not know the signs ....Sir
User avatar
P
Ks1859
Retired Moderator
Joined: 09 Jan 2021
Posts: 576
Own Kudos [?]: 846 [0]
Given Kudos: 194
GRE 1: Q167 V156
GPA: 4
WE:Analyst (Investment Banking)
Send PM
Reviews Badge
Re: abcd is different from zero [#permalink] New post   02 Jul 2021, 03:01
kumarneupane4344 wrote:
Carcass wrote:
\(abcd \neq 0\)

\(ad > bc\)

\(bd < 0\)


Quantity A
Quantity B
\(\frac{b}{a}\)
\( \frac{d}{c} \)




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.



After rearranging answer choice we get ad in one quantity and bc in another quantity, But we are clear said that ad > bc , Thus quantity B must be greater. Carcass sir!



Hi there!

Lets try to solve it this way!

Give: ad>bc
bd<0 this means that either b or d should be negative

So if d is negative, and b is positive. a has to be negative (because ad>bc) and c has to be negative......(1)
If d is positive, and b is negative. a has to be positive and c has to be positive......(2)

Using 1
Qty A: b/a= negative/positive
Qty B: d/c=positive/negative


Using 2
Qty A: b/a= positive/negative
Qty B: d/c= negative/positive

Now as we don't have the value of a, b, c & d we do not know which is greater and which is lesser.

Thus D

Hope this helps!
avatar
B
WonderWoman
Intern
Intern
Joined: 27 Sep 2021
Posts: 9
Own Kudos [?]: 6 [1]
Given Kudos: 6
Send PM
Re: abcd is different from zero [#permalink] New post   29 Sep 2021, 01:19
1
a b c d
+-++
-+--
-++-

Either b or d should be - but not both. Test for these cases with a table and you should get D in 2 mins
Prep Club for GRE Bot
gmatclubot
Re: abcd is different from zero [#permalink]
29 Sep 2021, 01:19
Moderators:
adewale223
GRE Instructor
88 posts
bronaugust
GRE Forum Moderator
37 posts
BrushMyQuant
Moderator
1115 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