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Senior Manager
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If x and y are positive integers, is 2x a multiple of y? (1) [#permalink]
 10 Sep 2011, 13:25
Question Stats:
33% (01:21) correct
66% (03:19) wrong based on 0 sessions
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. Attachment: 
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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. Posted from my mobile device 
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Senior Manager
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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.
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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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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"
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