If x and y are different integers and x^2=xy, which of the

Oldest

Best Reply

Author

Message

TAGS:

Intern

Joined: 21 Aug 2011

Posts: 27

Concentration: Leadership, Finance

Schools: HBS '15, Stanford '15, Wharton '15, Sloan '15, CBS '15

GMAT Date: 04-02-2012

GPA: 3.79

WE: Corporate Finance (Investment Banking)

Followers: 0

Kudos [?]: 7 [0], given: 0

If x and y are different integers and x^2=xy, which of the [#permalink]

10 Mar 2012, 08:22

00:00

Question Stats:

100% (01:22) correct

0% (00:00) wrong

based on 0 sessions

If x and y are different integers and x^2=xy, which of the following much be true?

I. X = 0
II. Y = 0
III. X = -Y

A. I only
B. II only
C. III only
D. I and III only
E. I, II, and III

[Reveal] Spoiler: OA

GMAT Club team member

Joined: 02 Sep 2009

Posts: 11583

Followers: 1798

Kudos [?]: 9582 [0], given: 826

Re: Arithmetic; Algebra on rational numbers help [#permalink]

10 Mar 2012, 08:27

Shko1 wrote:

If x and y are different integers and (x^2)=xy, which of the following much be true?

I. X = 0
II. Y = 0
III. X = -Y

A. I only
B. II only
C. III only
D. I and III only
E. I, II, and III

x^2=xy --> x(x-y)=0 --> either x=0 or x=y but since given that x and y are different numbers than the second option is out and we have: x=0. So, only I is always true (in fact because of the same reason that x and y are different numbers II and III are never true).

Answer: A.
_________________

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. NEW!!!

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!

What are GMAT Club Tests?
25 extra-hard Quant Tests

Find out what's new at GMAT Club - latest features and updates

Re: Arithmetic; Algebra on rational numbers help [#permalink] 10 Mar 2012, 08:27

		Similar topics	Author	Replies	Last post
Similar Topics:		If x and y are different integers and x^2 = xy, which of the	asaf	4	19 Sep 2006, 10:01
		Is x^2 = xy? (1) x^2 - y^2 = (x+5)(y-5) (2) x=y	overtherainbow	3	14 Apr 2007, 23:41
	1	If x and y are different integers and x^2 = xy, which of the	alimad	8	15 Jul 2007, 08:15
		if x and y are different integers and x^2=xy, which of the	el1981	5	24 Sep 2007, 08:33
		If x and y are different integers and x ^2 = x * y, which of	alimad	5	08 Jun 2008, 19:52

If x and y are different integers and x^2=xy, which of the

Main navigation

GMAT Resources

Partners

MBA Resources

GMAT ® is a registered trademark of the Graduate Management Admission Council ® (GMAC ®). GMAT Club's website has not been reviewed or endorsed by GMAC.

GMAT Courses

Admissions Consulting

If x and y are different integers and x^2=xy, which of the

If x and y are different integers and x^2=xy, which of the

Main navigation

GMAT Resources

Partners

MBA Resources