Last visit was: 26 Dec 2024, 03:17 It is currently 26 Dec 2024, 03:17
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

If XY represents a positive two-digit number, where X and Y are differ

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

User avatar
D
Carcass
Verbal Expert
Joined: 18 Apr 2015
Posts: 30503
Own Kudos [?]: 36860 [0]
Given Kudos: 26107
Send PM
If XY represents a positive two-digit number, where X and Y are differ [#permalink] New post   20 Jan 2022, 06:10
Expert Reply
00:00

Question Stats:

40% (00:47) correct 60% (01:17) wrong based on 10 sessions

Hide Show timer Statistics

If XY represents a positive two-digit number, where X and Y are different digits, which of the following CANNOT be true?

A. X + Y = 9

B. (X)(Y) = 9

C. X – Y = 9

D. Y – X = 9

E. X/Y=9
ShowHide Answer
Official Answer
D
User avatar
P
GreenlightTestPrep
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 12238 [0]
Given Kudos: 136
Send PM

Top Member of the Month
Re: If XY represents a positive two-digit number, where X and Y are differ [#permalink] New post   20 Jan 2022, 06:57
Carcass wrote:
If XY represents a positive two-digit number, where X and Y are different digits, which of the following CANNOT be true?

A. X + Y = 9

B. (X)(Y) = 9

C. X – Y = 9

D. Y – X = 9

E. X/Y=9


Let's eliminate answer choices by finding values that satisfy 4 of the given equations..
A. X + Y = 9
If X = 4 and Y = 5, then X + Y = 9
ELIMINATE A

B. (X)(Y) = 9
If X = 1 and Y = 9, then (X)(Y) = 9
ELIMINATE B

C. X – Y = 9
If X = 9 and Y = 0, then X - Y = 9
Important: Recognize that the two-digit number here is 90
ELIMINATE C

D. Y – X = 9
We may be tempted to use the values X = 0 and Y = 9 so that Y - X = 9. HOWEVER this would mean the two digit number is 09, which is a problem because 09 isn't technically a two-digit number, since 09 can be expressed as 9, a one-digit number
So, we'll keep answer choice D for now.

E. X/Y=9
If X = 9 and Y = 1, then X/Y = 9
ELIMINATE E

By the process of elimination, the answer is D
Prep Club for GRE Bot
gmatclubot
Re: If XY represents a positive two-digit number, where X and Y are differ [#permalink]
20 Jan 2022, 06:57
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