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Is x > y? (1) x + c > y + c (2) xc > yc

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Math Expert
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V
Joined: 02 Sep 2009
Posts: 42249

Kudos [?]: 132595 [0], given: 12326

Is x > y? (1) x + c > y + c (2) xc > yc [#permalink]

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New post 07 Sep 2017, 23:41
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

75% (00:33) correct 25% (00:15) wrong based on 20 sessions

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Kudos [?]: 132595 [0], given: 12326

Director
Director
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G
Joined: 18 Aug 2016
Posts: 550

Kudos [?]: 161 [0], given: 134

GMAT 1: 630 Q47 V29
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
Re: Is x > y? (1) x + c > y + c (2) xc > yc [#permalink]

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New post 07 Sep 2017, 23:45
Bunuel wrote:
Is x > y?

(1) x + c > y + c
(2) xc > yc



(1)subtracting c from both sides..sufficient
(2)we dont know the sign of c... not sufficient

A
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Luckisnoexcuse

Kudos [?]: 161 [0], given: 134

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Joined: 26 Mar 2013
Posts: 1284

Kudos [?]: 296 [0], given: 165

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Re: Is x > y? (1) x + c > y + c (2) xc > yc [#permalink]

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New post 09 Sep 2017, 03:05
Bunuel wrote:
Is x > y?

(1) x + c > y + c
(2) xc > yc


1) x + c > y + c

Cancel out c from both sides

x > y

Sufficient

(2) xc > yc

xc - yc > 0

c (x - y) > 0.............Two multiplied numbers to be positive is either both positive or both negative as follows:

x - y > 0... x > y & c > 0...Answer is yes

or

x - y < 0 ....x < y & c < 0...Answer is No

Insufficient

Answer: A

Kudos [?]: 296 [0], given: 165

Re: Is x > y? (1) x + c > y + c (2) xc > yc   [#permalink] 09 Sep 2017, 03:05
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