Events & Promotions
|
|
GMAT 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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 2601:30 AM EDT
-02:30 AM EDT
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more.
Apr 2512:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
May 0111:00 AM PDT
-12:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
16 Nov 2020, 03:00
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
67% (02:48) correct
33%
(02:55)
wrong
based on 393
sessions
History
Date
Time
Result
Not Attempted Yet
S is the set of all prime numbers that satisfy the inequality \(\frac{1}{|10-x|}\leq\frac{5}{x^2}\)
What is the value of the numerator of the fraction that is equal to the average (arithmetic mean) of S expressed in its most reduced terms?
A. 8
B. 9
C. 10
D. 11
E. 12
What is the value of the numerator of the fraction that is equal to the average (arithmetic mean) of S expressed in its most reduced terms?
A. 8
B. 9
C. 10
D. 11
E. 12
16 Nov 2020, 05:42
Kudos
Bookmarks
Bunuel
Got a bit lost in the wordings there. From what I understand, x should be a prime number that satisfies the inequality, and S is the set of all prime numbers x.
\(\frac{1}{|10 - x|} \leq \frac{5}{x^2}\) can be written as \(\frac{x^2}{|10 - x|} \leq 5\)
When x = 2, we have \(\frac{2^2}{|10 - 2|} = \frac{4}{8}\), which is \(\leq\) 5
When x = 3, we have \(\frac{3^2}{|10 - 7|} = \frac{9}{7}\), which is \(\leq\) 5
When x = 5, we have \(\frac{5^2}{|10 - 5|} = \frac{25}{5}\), which is \(\leq\) 5
Any other prime number greater than 5 will have the fractional value greater than 5.
S = {2, 3, 5}
The arithmetic mean = \(\frac{2 + 3 + 5}{3} = \frac{10}{3}\). The numerator is 10.
Option C
Arun Kumar
General Discussion
16 Nov 2020, 06:07
Kudos
Bookmarks
Bunuel
For finding the values of x, we will have to simplify the expression.
As we are looking for prime values, x is positive and even the mod and square are non-negative.
Thus we can cross multiply.
\(x^2\leq 5|10-x|\)
Clearly when x>5, x^2 will become greater
So 0<x<5.....we are looking for only prime values.
x=2, 3 and 5
Arithmetic mean =\(\frac{2+3+5}{3}=\frac{10}{3}\)
So numerator is 10.
C
