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Retired Moderator
Joined: 07 Jun 2014
Posts: 4806
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
a > 0
[#permalink]
09 May 2015, 11:09
09 May 2015, 11:09
Expert Reply
1
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Question Stats:
78% (00:35) correct
21% (00:30) wrong based on 147 sessions
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\(a>0\)
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Kudos for the right answer and explanation
_________________
Quantity A |
Quantity B |
\((4\sqrt{(5a)})^2\) |
\(40a\) |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Kudos for the right answer and explanation
_________________
Sandy
If you found this post useful, please let me know by pressing the Kudos Button
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If you found this post useful, please let me know by pressing the Kudos Button
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Re: GRE Math Challenge #91
[#permalink]
18 May 2015, 11:18
18 May 2015, 11:18
sandy wrote:
a > 0
Quantity A: \((4\sqrt{(5a)})^2\)
Quantity B: 40a
Quantity A: \((4\sqrt{(5a)})^2\)
Quantity B: 40a
Quantity A:
[4√(5a)]² = [4√(5a)][4√(5a)]
= (16)(5a)
= 80a
So, we have:
Quantity A: 80a
Quantity B: 40a
Subtract 40a from both quantities to get:
Quantity A: 40a
Quantity B: 0
Divide both quantities by 40 to get:
Quantity A: a
Quantity B: 0
The given information tells us that a > 0, so the correct answer is
Show: ::
A
Cheers,
Brent
_________________
Re: a > 0
[#permalink]
15 Jun 2021, 09:12
15 Jun 2021, 09:12
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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.
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