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

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Manager
Joined: 23 Jan 2008
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how many prime numbers are integer multiples of 16 ? 1. 0 2. [#permalink]

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04 Feb 2008, 19:49
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

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SVP
Joined: 29 Aug 2007
Posts: 2473

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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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Director
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04 Feb 2008, 23:25
1 ->2 is the only prime multiple of 16 ( 1 is not a prime number)
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Senior Manager
Joined: 26 Jan 2008
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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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CEO
Joined: 29 Mar 2007
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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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Manager
Joined: 07 Jan 2008
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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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Manager
Joined: 23 Jan 2008
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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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Manager
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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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Director
Joined: 20 Aug 2007
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Location: Chicago
Schools: Chicago Booth 2011

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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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Senior Manager
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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: prime numbers   [#permalink] 06 Feb 2008, 10:54
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