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# Is 30 the factor of n? 1) 30 is a factor of n^2 2) 30 is a

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Senior Manager
Joined: 08 Aug 2005
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Is 30 the factor of n? 1) 30 is a factor of n^2 2) 30 is a [#permalink]

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26 Apr 2006, 03:33
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Is 30 the factor of n?

1) 30 is a factor of n^2
2) 30 is a factor of 2n

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Director
Joined: 13 Nov 2003
Posts: 788

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Location: BULGARIA

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26 Apr 2006, 04:30
Hallo,
From A) if N=sqrt30 then 30 is not a factor of N. if N=30 then 30 is a factor of N and A is insuff.
From B( N acn be 15 or 30 which makes B) also insuff
from A&B together think we can conclude that 30 is a factor of N
So C)

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VP
Joined: 29 Apr 2003
Posts: 1403

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26 Apr 2006, 04:36
Agreed... nicely explained! I kinda almost missed the first part.. Then again it 430 am and I need to sleep...!!

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Intern
Joined: 12 Mar 2006
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27 Apr 2006, 12:08
Quote:
From A) if N=sqrt30 then 30 is not a factor of N. if N=30 then 30 is a factor of N and A is insuff.

I don't understand this, can someone explain?

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Manager
Joined: 20 Nov 2004
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27 Apr 2006, 12:57
sanjos wrote:
Quote:
From A) if N=sqrt30 then 30 is not a factor of N. if N=30 then 30 is a factor of N and A is insuff.

I don't understand this, can someone explain?

He wanted to give zwo different examples that led to two different
solutions, showing that (1) is not sufficient.

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27 Apr 2006, 12:57
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