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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
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Is 30 the factor of n? 1) 30 is a factor of n^2 2) 30 is a [#permalink]  26 Apr 2006, 02:33
Is 30 the factor of n?

1) 30 is a factor of n^2
2) 30 is a factor of 2n
Director
Joined: 13 Nov 2003
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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)
VP
Joined: 29 Apr 2003
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Agreed... nicely explained! I kinda almost missed the first part.. Then again it 430 am and I need to sleep...!!
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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?
Manager
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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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