Is x > y?

Expert replies

sanju09: GMAT Instructor; Posts: 3650; Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members; Location: India; Thanked: 267 times; GMAT Score:760

by sanju09 » Thu Mar 24, 2011 2:25 am

Is x > y?

(1) x/ (3 y) > 1/3.

(2) -x + p < -y + p.

https://www.urch.com/forums/gmat-problem-solving

The mind is everything. What you think you become. -Lord Buddha

Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com

Like this post

Source: Beat The GMAT — Data Sufficiency | Thu Mar 24, 2011 2:25 am

HSPA: Legendary Member; Posts: 1101; Joined: Fri Jan 28, 2011 7:26 amFollowed by: 13 members; Thanked: 47 times; GMAT Score:640

by HSPA » Thu Mar 24, 2011 5:30 am

B for me here

Like this post

nikhilsrl: Master | Next Rank: 500 Posts; Posts: 109; Joined: Mon Jan 10, 2011 3:05 amFollowed by: 7 members; Thanked: 8 times; GMAT Score:760

by nikhilsrl » Thu Mar 24, 2011 6:46 am

1) x/3y > 1/3 when evaluated this gives x>y - sufficient
2) -x+p< -y+p
adding -p on both sides -> -x < -y
multiplying by -1 on both sides -> x>y - sufficient

So D.

Like this post

kmittal82: Master | Next Rank: 500 Posts; Posts: 324; Joined: Mon Jul 05, 2010 6:44 amFollowed by: 3 members; Location: London; Thanked: 70 times

by kmittal82 » Thu Mar 24, 2011 7:20 am

IMHO, its (B)

(1)
Multiplying both sides by 3
x/y > 1

However, this doesn't mean x > y, since y could be negative

(2)
-x + p < -y + p
subtracting p from both
-x < -y
Multiplying by -1 both sides, signs change
x > y

Like this post

Night reader: Legendary Member; Posts: 1337; Joined: Sat Dec 27, 2008 6:29 pmFollowed by: 10 members; Thanked: 127 times

by Night reader » Thu Mar 24, 2011 10:59 am

x>y ?

st(1) we cannot multiply by 3y as we don't know if y (<), (>) 0, BUT we can multiply by 3 --> x/y >1.
It's possible to have x,y>0 OR x,y<0 for both variables (x and y) simultaneously, also |x|>|y|.
If x,y>0 then x>y. If x,y<0 x<y Not Sufficient;

st(2) -x+p < -y+p, -x < -y, x>y Sufficient

IOM B

sanju09 wrote:Is x > y?

(1) x/ (3 y) > 1/3.

(2) -x + p < -y + p.

https://www.urch.com/forums/gmat-problem-solving

My knowledge frontiers came to evolve the GMATPill's methods - the credited study means to boost the Verbal competence. I really like their videos, especially for RC, CR and SC. You do check their study methods at https://www.gmatpill.com

Like this post

MAAJ: Master | Next Rank: 500 Posts; Posts: 243; Joined: Sun Jul 12, 2009 7:12 amFollowed by: 2 members; Location: Dominican Republic; Thanked: 31 times; GMAT Score:480

by MAAJ » Thu Mar 24, 2011 3:32 pm

IMO (B)

x/y > 1

IF +x/+y > 1 THEN +x > +y (e.g. 8/2 > 1)

IF -x/-y > 1 THEN -x < -y (e.g. -8/-2 > 1)

So Statement 1 is insufficient.

"There's a difference between interest and commitment. When you're interested in doing something, you do it only when circumstance permit. When you're committed to something, you accept no excuses, only results."

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

560 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review