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Balvinder
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DS 3 gmat prep 07 Nov 2007, 06:09
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please explain this ..i dont have the OA.



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jbs
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DS 3 gmat prep 07 Nov 2007, 08:44
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I think the answer is C.

Statement 1 by itself gives us the following possibilities:

a=2,n=6

OR

a=4,n=3

OR

a=8,n=2

Statement 2 by itself doesnt give us the value of 'a' either.


Taking both statements together, we get the value of a=2


Is there something I am missing here?
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cstefanita
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DS 3 gmat prep 08 Nov 2007, 17:24
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Could it be B?

We know 1*2*3*4*5*6*7*8 is a multiple of a^n and with n=6, the only option is 2^6
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jbs
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DS 3 gmat prep 08 Nov 2007, 21:44
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cstefanita
Could it be B?

We know 1*2*3*4*5*6*7*8 is a multiple of a^n and with n=6, the only option is 2^6
Show more


You are spot on. I still cant figure out how statement 1 is sufficient by itself though.
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GMATBLACKBELT
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DS 3 gmat prep 08 Nov 2007, 22:16
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cstefanita
Could it be B?

We know 1*2*3*4*5*6*7*8 is a multiple of a^n and with n=6, the only option is 2^6
Show more



I agree that a^n, w/ n=6 that a can only be 2.

However, I fail to see anywhere in the original stem relating a to n.

All S2 says is n=6. The original stem says that a & n are + integers. Nothing more about a & n. It does say that a is divisble by 8! or 8! is a multiple of a.

I cannot see how B is correct. A as well, I don't see how it can't be correct as pointed at by JBS.


So i would go w/ C.
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jbs
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DS 3 gmat prep 08 Nov 2007, 22:25
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jbs
I think the answer is C.

Statement 1 by itself gives us the following possibilities:

a=2,n=6

OR

a=4,n=3

OR

a=8,n=2

Statement 2 by itself doesnt give us the value of 'a' either.

Taking both statements together, we get the value of a=2

Is there something I am missing here?
Show more


The mind plays games. Thats the logic i had used to answer the post in the first place. Over a period of time, i actually forgot that and figured i might have made a mistake.....
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DS 3 gmat prep 08 Nov 2007, 23:40
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I get B.

Stat 1: a could be 4 & n could be 3 or a could be 2 & n could be 6. Insuff.

Stat 2: n = 6
Given: a^n is a factor of 8!
If n = 6 then the only value that 'a' can assume, in order to be a factor of 8! is 2. Suff.
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DS 3 gmat prep 08 Nov 2007, 23:47
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GK_Gmat
I get B.

Stat 1: a could be 4 & n could be 3 or a could be 2 & n could be 6. Insuff.

Stat 2: n = 6
Given: a^n is a factor of 8!
If n = 6 then the only value that 'a' can assume, in order to be a factor of 8! is 2. Suff.
Show more



Ok I agree its B.

My laptop screen is tiny so I couldnt really see the n in a^n in the original statement.



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