Last visit was: 22 Dec 2024, 19:31 It is currently 22 Dec 2024, 19:31

Close

GRE Prep Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GRE score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Verbal Expert
Joined: 18 Apr 2015
Posts: 30475
Own Kudos [?]: 36822 [1]
Given Kudos: 26100
Send PM
Verbal Expert
Joined: 18 Apr 2015
Posts: 30475
Own Kudos [?]: 36822 [0]
Given Kudos: 26100
Send PM
avatar
Intern
Intern
Joined: 08 Aug 2019
Posts: 28
Own Kudos [?]: 39 [1]
Given Kudos: 0
Location: United States
Send PM
Verbal Expert
Joined: 18 Apr 2015
Posts: 30475
Own Kudos [?]: 36822 [0]
Given Kudos: 26100
Send PM
Re: In the equation above, if K [#permalink]
1
Expert Reply
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
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 12234 [0]
Given Kudos: 136
Send PM
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!
Verbal Expert
Joined: 18 Apr 2015
Posts: 30475
Own Kudos [?]: 36822 [0]
Given Kudos: 26100
Send PM
Re: In the equation above, if K [#permalink]
Expert Reply
:thanks :thanks
User avatar
GRE Prep Club Legend
GRE Prep Club Legend
Joined: 07 Jan 2021
Posts: 5090
Own Kudos [?]: 76 [0]
Given Kudos: 0
Send PM
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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Prep Club for GRE Bot
Re: In the equation above, if K [#permalink]
Moderators:
GRE Instructor
88 posts
GRE Forum Moderator
37 posts
Moderator
1115 posts
GRE Instructor
234 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne