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# Is x < 20?

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Director
Status: Preparing for the 4th time -:(
Joined: 25 Jun 2011
Posts: 537
Location: United Kingdom
Concentration: International Business, Strategy
GMAT Date: 06-22-2012
GPA: 2.9
WE: Information Technology (Consulting)
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Kudos [?]: 113 [0], given: 212

Is x < 20? [#permalink]  20 Mar 2012, 08:07
00:00

Difficulty:

25% (low)

Question Stats:

75% (01:41) correct 25% (00:57) wrong based on 32 sessions
Is x < 20?

(1) Sum of x and y is less than 20
(2) y is less than 20
[Reveal] Spoiler: OA

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E.

MGMAT 1 --> 530
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Math Expert
Joined: 02 Sep 2009
Posts: 15140
Followers: 2535

Kudos [?]: 15625 [0], given: 1565

Re: Is x less than 20? [#permalink]  20 Mar 2012, 08:17
Expert's post
enigma123 wrote:
Is x < 20?

1. Sum of x and y is less than 20

2. y is less than 20

How come the answer is E and not A?

Consider two cases:
x=30 and y=-15;
x=15 and y=-15;

Both examples satisfy the statements and give different answers to the question whether x<20. Not sufficient.

Answer: E.
_________________
Re: Is x less than 20?   [#permalink] 20 Mar 2012, 08:17
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# Is x < 20?

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