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Is x < y? (1) z < y (2) z < x

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Is x < y? (1) z < y (2) z < x [#permalink] New post 30 Jan 2012, 16:24
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

96% (01:18) correct 4% (00:19) wrong based on 51 sessions
Is x < y?

(1) z < y
(2) z < x
[Reveal] Spoiler: OA

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Re: Is x < y? [#permalink] New post 30 Jan 2012, 16:30
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Expert's post
DesecratoR wrote:
Is x < y?
(1) z < y
(2) z < x

Well, I don't agree with answer given, and I 'm little bit frustrated because I think this is an easy question. Need your opinion and help if I 'm wrong. Thank you!

My reasoning:

Stmt 1:
z<y, ok. Doesn't provide information about relation between x and y. If z>x then x<z<y. But if z<x, we don't know anything about relation between x and y. So, not sufficient.

Stmt 2:
z<x, ok. z could be also less than y, hence no information about relation between x and y. Not sufficient.

Taken together, still not sufficient.

Answer: E


You are right for (1)+(2) we just have that x and y are more than some number z, we clearly cannot say whether x<y. So, the answer is E.

Notice that if (2) were x<z then the answer would be C, as for (1)+(2) we would have x<z<y --> x<y.

Hope it helps.
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Re: Is x < y? [#permalink] New post 30 Jan 2012, 16:34
Bunuel wrote:
DesecratoR wrote:
Is x < y?
(1) z < y
(2) z < x

Well, I don't agree with answer given, and I 'm little bit frustrated because I think this is an easy question. Need your opinion and help if I 'm wrong. Thank you!

My reasoning:

Stmt 1:
z<y, ok. Doesn't provide information about relation between x and y. If z>x then x<z<y. But if z<x, we don't know anything about relation between x and y. So, not sufficient.

Stmt 2:
z<x, ok. z could be also less than y, hence no information about relation between x and y. Not sufficient.


Taken together, still not sufficient.

Answer: E


You are right for (1)+(2) we just have that x and y are more than some number z, we clearly cannot say whether x<y. So, the answer is E.

Notice that if (2) were x<z then the answer would be C, as for (1)+(2) we would have x<z<y --> x<y.

Hope it helps.


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Is x < y? [#permalink] New post 28 Apr 2012, 20:19
Is x < y?
(1) z < y
(2) z < x

I feel that the question or the OA is incorrect.... I choose E as the answer however the OA is something else
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Re: Is x < y? [#permalink] New post 28 Apr 2012, 22:52
i agree with you. Dont know how A can alone give the answer :shock:
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Re: Is x < y? [#permalink] New post 28 Apr 2012, 23:06
A is surely not the answer ... does not make any sense .

1.z<y does not say anything about x so insufff...
2.plotting number line

z--------x------y
z--------y------x
Both can be true so insufficient .

E
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Re: Is x < y? [#permalink] New post 29 Apr 2012, 02:09
Expert's post
boomtangboy wrote:
Is x < y?
(1) z < y
(2) z < x

I feel that the question or the OA is incorrect.... I choose E as the answer however the OA is something else


Merging similar topics. You are right, the correct answer is E, not A.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

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; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

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. ,11 Mixed Questions, 12 Fresh Meat

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., 11 New DS set.


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Re: Is x < y? (1) z < y (2) z < x [#permalink] New post 06 Jan 2013, 02:18
agreed ... E it is ..
Re: Is x < y? (1) z < y (2) z < x   [#permalink] 06 Jan 2013, 02:18
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