BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

GmatPrep 2

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 66
Joined: Sun Jun 29, 2008 8:37 pm
Location: India
Thanked: 1 times

GmatPrep 2

by msd_2008 » Thu Dec 11, 2008 10:09 pm
Q. If x-y>10, is x-y>x+y?

1. x = 8
2. y = -20

OA is C.
I had marked B because when we try to solve the inequality x-y>x+y we get 0 > 2y which means we only need to know that y is negative. Hence, B.
Can someone explain what is wrong with my logic?

Regards
MSD
When the going gets tough, the tough gets going.
Top
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 546
Joined: Sun Nov 16, 2008 11:00 pm
Location: New Delhi , India
Thanked: 13 times

by ronniecoleman » Thu Dec 11, 2008 10:12 pm
IMO D
Admission champion, Hauz khaz
011-27565856
Top
Senior | Next Rank: 100 Posts
Posts: 72
Joined: Thu Nov 06, 2008 10:27 am
Location: Pittsburgh
Thanked: 4 times

Re: GmatPrep 2

by srisl11 » Thu Dec 11, 2008 10:18 pm
msd_2008 wrote:Q. If x-y>10, is x-y>x+y?

1. x = 8
2. y = -20

MSD
The question can be rephrased as is y < 0?

Statement 2 gives the value of y ...
so St 1 is suff

Statement 1 : x = 8
given x-y> 10
=> 8-y>10
=> -y > 2
=> y < -2
=> y is a negative integer
y<0
So St 2 is also suff

So IMO D
Top
Legendary Member
Posts: 1035
Joined: Wed Aug 27, 2008 10:56 pm
Thanked: 104 times
Followed by:1 members

by scoobydooby » Thu Dec 11, 2008 10:22 pm
msd, are you sure about the OA?
found another link, they give the OA to be D

https://www.beatthegmat.com/ds-question-t18317.html
Top
Senior | Next Rank: 100 Posts
Posts: 53
Joined: Wed Dec 10, 2008 5:47 am
Location: Rorkee

by CrackGMAC » Fri Dec 12, 2008 11:50 pm
If x-y>10

When u put x = 8 in given eq. u get y < 2 which you will come to know from eq 2 only. Hence C.

But I will go with B only.
Beat The GMAT
Top
User avatar
Legendary Member
Posts: 2134
Joined: Mon Oct 20, 2008 11:26 pm
Thanked: 237 times
Followed by:25 members
GMAT Score:730

Re: GmatPrep 2

by logitech » Sat Dec 13, 2008 12:04 am
msd_2008 wrote:Q. If x-y>10, is x-y>x+y?

1. x = 8
2. y = -20

OA is C.
I had marked B because when we try to solve the inequality x-y>x+y we get 0 > 2y which means we only need to know that y is negative. Hence, B.
Can someone explain what is wrong with my logic?

Regards
MSD
You are correct about is y<0 but what you forget about is the condition given by the question: x-y>10

1. x = 8

so 8-y>10 ...... y < -2 SUF

2. SUF

Hence D
LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"
Top
User avatar
Legendary Member
Posts: 2134
Joined: Mon Oct 20, 2008 11:26 pm
Thanked: 237 times
Followed by:25 members
GMAT Score:730

by logitech » Sat Dec 13, 2008 12:06 am
CrackGMAC wrote:If x-y>10

When u put x = 8 in given eq. u get y < 2 which you will come to know from eq 2 only. Hence C.

But I will go with B only.


If you get y<2 , y =1 would work. Lets see

8-1 = 7

Is 7 > 10 NO

You just missed that little ( - ) sign in your calculation, which cost you an answer!
LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"
Top
Post new topic Post Reply
• Page 1 of 1