Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 05 May 2015, 02:30

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If xy=1, what is the value of / ? A)2 B)4 C)8 D)16 E)32 Is

Author Message
TAGS:
Intern
Joined: 29 May 2008
Posts: 2
Followers: 0

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

If xy=1, what is the value of / ? A)2 B)4 C)8 D)16 E)32 Is [#permalink]  29 May 2008, 10:56
If xy=1, what is the value of [2(x+y)^2]/[2(x-y)^2]?

A)2
B)4
C)8
D)16
E)32

Is integer x positive ?

1) x > x^3
2) x < x^2

If p,q,r are even numbers such that 2<p<q<r
what is the value of q ?
1) r<10
2)p<6
SVP
Joined: 30 Apr 2008
Posts: 1892
Location: Oklahoma City
Schools: Hard Knocks
Followers: 34

Kudos [?]: 468 [0], given: 32

Do you mean it to be this...

$$\frac{2(x+y)^2}{2(x-y)^2}$$

If so, that would become

$$\frac{2(x^2 + 2xy + y^2)}{2(x^2 - 2xy + y^2)}$$

$$\frac{2x^2 + 4xy + 2y^2}{2x^2 - 4xy + 2y^2}$$

If xy=1, then...

$$\frac{2x^2 + 4 + 2y^2}{2x^2 - 4 + 2y^2}$$

From this, if I did it right, none of the answer choices fit.

Extremepbs wrote:
If xy=1, what is the value of [2(x+y)^2]/[2(x-y)^2]?

A)2
B)4
C)8
D)16
E)32

Is integer x positive ?

1) x > x^3
2) x < x^2

If p,q,r are even numbers such that 2<p<q<r
what is the value of q ?
1) r<10
2)p<6

_________________

------------------------------------
J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a$$. GMAT Club Premium Membership - big benefits and savings SVP Joined: 08 Nov 2006 Posts: 1560 Location: Ann Arbor Schools: Ross '10 Followers: 13 Kudos [?]: 169 [0], given: 1 Re: GMAT Trap Ques - Please HELP! [#permalink] 29 May 2008, 13:01 I think the question is $${{2}^{{(x+y)}^{2}}}/{2}^{{(x-y)}^{2}}$$ If you expand the exponents and reduce the expression, it will become $${2}^{4xy}$$ if xy=1, then the expression then becomes $${2}^{4}$$. The answer is 16. SVP Joined: 30 Apr 2008 Posts: 1892 Location: Oklahoma City Schools: Hard Knocks Followers: 34 Kudos [?]: 468 [0], given: 32 Re: GMAT Trap Ques - Please HELP! [#permalink] 29 May 2008, 13:06 That makes sense because when you have the same base (i.e., $$\frac{2^4}{2^3} = 2^1 = 2$$), you subtract the denominator's exponent from the numerator's exponent. ncprasad wrote: I think the question is $${{2}^{{(x+y)}^{2}}}/{2}^{{(x-y)}^{2}}$$ If you expand the exponents and reduce the expression, it will become $${2}^{4xy}$$ if xy=1, then the expression then becomes $${2}^{4}$$. The answer is 16. _________________ ------------------------------------ J Allen Morris **I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a$$.

GMAT Club Premium Membership - big benefits and savings

Current Student
Joined: 28 Dec 2004
Posts: 3391
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 181 [0], given: 2

I think the question is

$${{2}^{{(x+y)}^{2}}}/{2}^{{(x-y)}^{2}}$$

If you expand the exponents and reduce the expression, it will become $${2}^{4xy}$$

if xy=1, then the expression then becomes $${2}^{4}$$. The answer is 16.

i too get 2^4... assuming thats what the question asks..
Similar topics Replies Last post
Similar
Topics:
if xy=1, what is the value of 2(x+y)^2/2(x-y)^2 a.2 b.4 c.8 9 12 Jul 2008, 09:46
If xy=1, what is the value of / a) 2 b) 4 c) 8 d) 16 e) 32 10 07 Jul 2008, 16:55
If xy=1, what is the value of 2^^2/2^^2 A) 2 B) 4 C) 8 1 12 Nov 2006, 04:21
If XY=1, what is the value of / ? A. 2 B. 4 C. 8 D. 3 01 Feb 2006, 19:53
If xy = 1, what is the value of /? a) 2 b) 4 c) 8 d) 16 e) 1 25 Dec 2005, 15:34
Display posts from previous: Sort by