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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]

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04 Feb 2008, 18:49
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

how many prime numbers are integer multiples of 16 ?

1. 0
2. 1
3. 2
4. 4
5. 6
SVP
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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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04 Feb 2008, 22:25
1 ->2 is the only prime multiple of 16 ( 1 is not a prime number)
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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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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.
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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
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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 ?
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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.

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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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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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