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# If x and y are positive integers, is 2x a multiple of y? (1)

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Senior Manager
Joined: 08 Nov 2010
Posts: 388

Kudos [?]: 133 [0], given: 161

WE 1: Business Development
If x and y are positive integers, is 2x a multiple of y? (1) [#permalink]

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10 Sep 2011, 12:25
00:00

Difficulty:

85% (hard)

Question Stats:

38% (00:55) correct 62% (01:44) wrong based on 37 sessions

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If x and y are positive integers, is 2x a multiple of y?

(1) 2x + 2 is a multiple of y.

(2) y ix a multiple of x.

[Reveal] Spoiler:
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[Reveal] Spoiler: OA

_________________

Kudos [?]: 133 [0], given: 161

Current Student
Joined: 08 Jan 2009
Posts: 323

Kudos [?]: 165 [1], given: 7

GMAT 1: 770 Q50 V46
Re: 2x and y [#permalink]

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10 Sep 2011, 15:55
1
This post received
KUDOS
1) x=2, y=2. Yes.
x=5, y=3. No.

NS.

2) x=1, y=1. Yes.
x=3, y=9. No.

NS.

E.

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Kudos [?]: 165 [1], given: 7

Senior Manager
Joined: 08 Nov 2010
Posts: 388

Kudos [?]: 133 [0], given: 161

WE 1: Business Development
Re: 2x and y [#permalink]

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10 Sep 2011, 16:04
Thanks. But i was looking for algebric way - usually i do it faster and with less mistakes.

+1 for the answer. Would be happy to know your technique to choose the numbers to plug in. thanks.
_________________

Kudos [?]: 133 [0], given: 161

Director
Status: My Thread Master Bschool Threads-->Krannert(Purdue),WP Carey(Arizona),Foster(Uwashngton)
Joined: 27 Jun 2011
Posts: 879

Kudos [?]: 247 [0], given: 57

Re: 2x and y [#permalink]

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14 Sep 2011, 12:16
144144 wrote:
Hey guys, would be happy so see how you guys solve this one.

thanks.

2x + 2 is multiple of y

If x is 1 Then 2x + 2 = Odd/y

If x is 2 then 2x + 2 = Even /y

Statement 1 insuff

Y is multiple of x

Again dosent provide any number, more over we can not determine what x is...

Statemnt 2 insuff.

Together also we can not determine...

IMOE
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Kudos [?]: 247 [0], given: 57

Manager
Status: MBA Aspirant
Joined: 12 Jun 2010
Posts: 171

Kudos [?]: 106 [0], given: 1

Location: India
Concentration: Finance, International Business
WE: Information Technology (Investment Banking)
Re: 2x and y [#permalink]

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17 Sep 2011, 00:22
My take on this.

Statement 1: 2x+2 is a multiple of y => cannot imply that 2x is also a multiple of y
not sufficient.
Statement 2: y is a multiple of x => cannot prove that 2x is also a multiple of y
not sufficient.

IMO "E"

Kudos [?]: 106 [0], given: 1

Re: 2x and y   [#permalink] 17 Sep 2011, 00:22
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# If x and y are positive integers, is 2x a multiple of y? (1)

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