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If n is a positive integer and k=5.1*10^n , what is the

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If n is a positive integer and k=5.1*10^n , what is the [#permalink] New post 03 Jun 2005, 12:31
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If n is a positive integer and k=5.1*10^n , what is the value of k?

1) 6000<k<500,000
2)k^2=2.601*10^9

Best.
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Re: DS [#permalink] New post 03 Jun 2005, 13:16
doloris wrote:
If n is a positive integer and k=5.1*10^n , what is the value of k?

1) 6000<k<500,000
2)k^2=2.601*10^9

Best.


would pick D

with statement 1, only one possible value is possible - 51,000

and with statement 2 the equation in the question isnt even required (which is a bit bizarre)
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 [#permalink] New post 03 Jun 2005, 16:25
[quote="fresinha12"]D for me too[/quote]

My first post. I am doing really bad in Math.
Isn't it A?
k^2 = etc...
k could be either +ve or -ve.
it's said n is +ve. Nothing is mentioned about k[quote][/quote]
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 [#permalink] New post 03 Jun 2005, 16:28
[quote="smjohn"][quote="fresinha12"]D for me too[/quote]

OK Got it.
k=5.1*10^n proves that k is +ve.
But this equation is necessary I guess.
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 [#permalink] New post 03 Jun 2005, 17:25
dont the two conditions give different values for n as well? I dont think GMAT does that?
  [#permalink] 03 Jun 2005, 17:25
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