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how many prime numbers are integer multiples of 16 ? 1. 0 2.

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how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   04 Feb 2008, 19:49
how many prime numbers are integer multiples of 16 ?

1. 0
2. 1
3. 2
4. 4
5. 6



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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   04 Feb 2008, 23:17
blog wrote:
how many prime numbers are integer multiples of 16 ?

1. 0
2. 1
3. 2
4. 4
5. 6


not quit clear. guess one i.e: 2.
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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   04 Feb 2008, 23:25
1 ->2 is the only prime multiple of 16 ( 1 is not a prime number)
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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   05 Feb 2008, 00:47
blog wrote:
how many prime numbers are integer multiples of 16 ?

1. 0
2. 1
3. 2
4. 4
5. 6


(A) as question asks for multiples as opposed to factors
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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   05 Feb 2008, 02:15
blog wrote:
how many prime numbers are integer multiples of 16 ?

1. 0
2. 1
3. 2
4. 4
5. 6


Ima say A, though im not really clear on this question.
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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   05 Feb 2008, 08:36
Agree with Incognito1...A it seems

incognito1 wrote:
blog wrote:
how many prime numbers are integer multiples of 16 ?

1. 0
2. 1
3. 2
4. 4
5. 6


(A) as question asks for multiples as opposed to factors
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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   05 Feb 2008, 11:33
GMATBLACKBELT wrote:
blog wrote:
how many prime numbers are integer multiples of 16 ?

1. 0
2. 1
3. 2
4. 4
5. 6


Ima say A, though im not really clear on this question.


yeah the answer is A i.e 0. but m not getting how ?
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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   05 Feb 2008, 13:44
A- 0

Its like

16 * something integer = gives a prime number

eg. 16 * 1/8 = does give 2 but 1/8 is not integer.

-Jack
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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   06 Feb 2008, 10:23
incognito1 wrote:
blog wrote:
how many prime numbers are integer multiples of 16 ?

1. 0
2. 1
3. 2
4. 4
5. 6


(A) as question asks for multiples as opposed to factors


Agreed.

Remember....MORE MULTIPLES, FEWER FACTORS
This asks for multiples, so logically no prime numbers can be multiples of 16 (or else they wouldn't be prime)
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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink] New post   06 Feb 2008, 10:54
Am I missing something here.

I thought (A) was too obvious.

How can it remain a prime number if it has 2 integer factors (with one 16)?

I am bit lost. Perhaps its a straightforward and simple questions.

Anyone with different answer and explanation



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Re: how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink]
06 Feb 2008, 10:54
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