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.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Your score will improve and your results will be more realistic
Is there something wrong with our timer?Let us know!
There is no doubt about it; applying to MBA Business School is a journey. Unfortunately, there are common mistakes that arise over and over again from candidates as they immerse themselves in the MBA application journey which can easily be avoided.
Target Test Prep GRE course is a unique, comprehensive online quant course that combines innovative software with time-tested study methods to prepare you for the rigors of the GRE. Offer valid until May 31
School selection is a key component of Personal MBA Coach's services. Download our latest e-book to get an industry expert's insight on school selection and MBA rankings:
Strategy is a key aspect in acing the GRE exam - a single mistake could lead to an undesirable outcome. Attend this advanced session conducted by one of our strategy experts Piyush Beriwala, where he'll help you decode the GRE algorithm
Re: GRE prep Club test question
[#permalink]
27 Jun 2017, 10:45
3
Expert Reply
1
Bookmarks
saumya17lc wrote:
This is from Quant test#4 question ID: Q02-33
If \(x^4\) \(=\) \(29x^2\) − \(100\), then which of the following is NOT a product of three possible values of x : I. -50 II. 25 III. 50
a. I only b. II only c. III only d. I and II only e. I and III only
At first, we might not recognize that the given equation is a quadratic equation in disguise.
To see this, you must notice that (x^2)^2 = x^4
Now, if we let u = x^2, then we can rewrite the given equation. We get: u^2 = 29u - 100 Rearrange to get: u^2 - 29u + 100 = 0 Factor to get: (u - 4)(u - 25) = 0 So, either u = 4, or u = 25
At this point, we can replace u with x^2 to get: Either x^2 = 4, or x^2 = 25
If x^2 = 4, then x = 2 or x = -2 If x^2 = 25, then x = 5 or x = -5
So, there are 4 possible values of x: 2, -2, 5, and -5
Which of the following is NOT a product of three possible values of x : I. -50 II. 25 III. 50
a. I only b. II only c. III only d. I and II only e. I and III only
I. 50 (-2)(5)(-5) = 50 Since 50 is possible, we can eliminate A, D and E
III. -50 (2)(5)(-5) = 50 Since -50 is possible, we can eliminate C
NOTE: At this point, we need not examine statement II, since we have already eliminated answer choices A, C, D and E
Re: GRE prep Club test question
[#permalink]
26 Jul 2017, 01:31
1
I am having trouble understanding the wording : If x^4 = 29x^2 − 100, then which of the following is NOT a product of three possible values of x : I. -50 II. 25 III. 50
Based on the question we get x = -2 and + 2 and +4 and -4. Thus 50 and -50 is possible. While "NOT A PRODUCT" - 25 is not possible. Hence I chose B "II only" Please do help with clarity of the question - as per OA option E, I and III is not a possible value - which is not true. Thank you!
a. I only b. II only c. III only d. I and II only e. I and III only
Re: GRE prep Club test question
[#permalink]
26 Jul 2017, 06:17
1
Expert Reply
nancyjose wrote:
I am having trouble understanding the wording : If x^4 = 29x^2 − 100, then which of the following is NOT a product of three possible values of x : I. -50 II. 25 III. 50
Based on the question we get x = -2 and + 2 and +4 and -4. Thus 50 and -50 is possible. While "NOT A PRODUCT" - 25 is not possible. Hence I chose B "II only" Please do help with clarity of the question - as per OA option E, I and III is not a possible value - which is not true. Thank you!
a. I only b. II only c. III only d. I and II only e. I and III only
You are right we are correcting the test question.
Thank you for pointing out!
_________________
Sandy If you found this post useful, please let me know by pressing the Kudos Button
Re: GRE prep Club test question
[#permalink]
05 Jun 2021, 04:59
1
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.