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

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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, 03:33

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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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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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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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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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.

[#permalink] 27 Apr 2006, 12:57

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

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

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