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

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Manager
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how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink]  04 Feb 2008, 18:49
how many prime numbers are integer multiples of 16 ?

1. 0
2. 1
3. 2
4. 4
5. 6
SVP
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Re: prime numbers [#permalink]  04 Feb 2008, 22:17
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: prime numbers [#permalink]  04 Feb 2008, 22:25
1 ->2 is the only prime multiple of 16 ( 1 is not a prime number)
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Re: prime numbers [#permalink]  04 Feb 2008, 23:47
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: prime numbers [#permalink]  05 Feb 2008, 01:15
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.
Manager
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Re: prime numbers [#permalink]  05 Feb 2008, 07:36
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
Manager
Joined: 23 Jan 2008
Posts: 108
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Re: prime numbers [#permalink]  05 Feb 2008, 10:33
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 ?
Manager
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Re: prime numbers [#permalink]  05 Feb 2008, 12:44
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: prime numbers [#permalink]  06 Feb 2008, 09:23
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: prime numbers [#permalink]  06 Feb 2008, 09:54
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
Re: prime numbers   [#permalink] 06 Feb 2008, 09:54
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# how many prime numbers are integer multiples of 16 ? 1. 0 2.

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