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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] New post 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
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 [#permalink] New post 26 Apr 2006, 03:30
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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 [#permalink] New post 26 Apr 2006, 03:36
Agreed... nicely explained! I kinda almost missed the first part.. Then again it 430 am and I need to sleep...!!
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 [#permalink] New post 27 Apr 2006, 11:08
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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 [#permalink] New post 27 Apr 2006, 11:57
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, 11:57
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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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