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Is the integer n a multiple of 15 1. n is a multiple of 20

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Manager
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Is the integer n a multiple of 15 1. n is a multiple of 20 [#permalink]

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New post 04 Jun 2006, 01:11
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A
B
C
D
E

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Is the integer n a multiple of 15

1. n is a multiple of 20
2. n+6 is a multiple of 3
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Re: GMATPREP DS: Is the integer n a multiple of 15 [#permalink]

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New post 04 Jun 2006, 08:46
dinesh8 wrote:
Is the integer n a multiple of 15

1. n is a multiple of 20
2. n+6 is a multiple of 3


C .
1) tells its a multiple of 5
2) tells its a multiple of 3

both tell its a multiple of 15
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Re: GMATPREP DS: Is the integer n a multiple of 15 [#permalink]

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New post 06 Jun 2006, 12:22
dinesh8 wrote:
Is the integer n a multiple of 15

1. n is a multiple of 20
2. n+6 is a multiple of 3


from i, if n is a multiple of 20, then it could be or could not be a multiple of 15. if n = 60, yes. if n = 40, no.

from ii, if n+6 is a multiple of 3, then n is also a multiple of 3. now if n is a multiple of 3 and 30, then it is also a multiple of 60 and multiples of 60.

multiple of 60 is also a multiple of 15 cuz 60 is a multiple of 15.
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Re: GMATPREP DS: Is the integer n a multiple of 15 [#permalink]

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New post 07 Jun 2006, 05:52
dinesh8 wrote:
Is the integer n a multiple of 15

1. n is a multiple of 20
2. n+6 is a multiple of 3


I would go with C too.

Professor are you saying it is just B?

What is the OA?
Re: GMATPREP DS: Is the integer n a multiple of 15   [#permalink] 07 Jun 2006, 05:52
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Is the integer n a multiple of 15 1. n is a multiple of 20

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