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Re: In the equation above, if K [#permalink]
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k and m are different integers

Currently, k=m, because both k and m equal to 12

\(12 \sqrt{12} = k \sqrt{m}\)

The variable m is the value under the square root symbol, rather than the value that results when m is placed under the square root symbol.

So if k and m are currently equal, but k must be different than m, how can we increase k or m ?? Factoring the square root

\(12 \times \sqrt{12} \)

\(12 \times \sqrt{4} \times \sqrt{3}\)

\(12 \times \pm 2 \times \sqrt{3}\)

\(24 \times \sqrt{3}\) or \(-24 \times \sqrt{3}\)

Now \(k = 24\) or \(k = -24\) and \(m=3\). Find \(k+m\): \(24+3=27\) or \(-24+3=-21\)

B and E are the answers


Guys, above is the official explanation. In my opinion, it is clearly bogus because the \(\sqrt{4}\) cannot be \(\pm2\) . For the GRE it is only +2 the positive root accepted.

Waiting for GreenLightTestPrep for insights
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Re: In the equation above, if K [#permalink]
Carcass wrote:

Guys, above is the official explanation. In my opinion, it is clearly bogus because the \(\sqrt{4}\) cannot be \(\pm2\) . For the GRE it is only +2 the positive root accepted.

Waiting for GreenLightTestPrep for insights


I concur with clearly bogus

BAD question!
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Re: In the equation above, if K [#permalink]
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:thanks :thanks
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Re: In the equation above, if K [#permalink]
Hello from the GRE Prep Club BumpBot!

Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: In the equation above, if K [#permalink]
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