Forum Home > GMAT > Quantitative > Problem Solving (PS)
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.
Dec 1410:00 AM EST
-12:00 PM EST
Think a 100% GMAT Verbal score is out of your reach? Target Test Prep will make you think again! Our course uses techniques such as topical study and spaced repetition to maximize knowledge retention and make studying simple and fun.
Dec 1411:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- Dec 15
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Dec 1608:00 AM PST
-11:59 PM PST
GMAT Club 12 Days of Christmas is a 4th Annual GMAT Club Winter Competition based on solving questions. This is the Winter GMAT competition on GMAT Club with an amazing opportunity to win over $40,000 worth of prizes!- Dec 17
09:00 AM PST
-10:00 AM PST
Join Manhattan Prep instructor Whitney Garner for a fun—and thorough—review of logic-based (non-math) problems, with a particular emphasis on Data Sufficiency and Two-Parts. - Dec 18
10:00 AM PST
-11:00 AM PST
Here is the essential guide to securing scholarships as an MBA student! In this video, we explore the various types of scholarships available, including need-based and merit-based options.
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
39% (01:18) correct
61%
(01:33)
wrong
based on 82
sessions
History
Date
Time
Result
Not Attempted Yet
If r is a prime number and s is a positive integer, is \(\frac{r^3}{s}\) a terminating decimal?
(1) r \(\geq\) 5
(2) s = 75
(1) r \(\geq\) 5
(2) s = 75
20 Jan 2016, 01:04
Kudos
Bookmarks
naumyuk
If r is a prime number and s is a positive integer, is a \(\frac{r^3}{c}\) terminating decimal?
(1) r \(\geq\) 5
(2) s = 75
(1) r \(\geq\) 5
(2) s = 75
Editing your Q as in present state answer is E..
c in \(\frac{r^3}{c}\) must be 's'..
so we have to find if \(\frac{r^3}{s}\) is a terminating decimal...
the value depends on the denominator in its simplified form..
lets see the statements..
(1) r \(\geq\) 5
it just tell us that r cannot br 2 and 3 nothing else..
insuff
(2) s = 75
the denominator is 75...
if the numerator is 3 it will be a terminating decimal, otherwise not...
insuff..
combined we know numerator does not have 3, so it will not be a terminating decimal, as we have 3 in denominator..
suff
C
ashikaverma13
10 Apr 2017, 04:58
Kudos
Bookmarks
chetan2u
naumyuk
If r is a prime number and s is a positive integer, is a \(\frac{r^3}{c}\) terminating decimal?
(1) r \(\geq\) 5
(2) s = 75
(1) r \(\geq\) 5
(2) s = 75
Editing your Q as in present state answer is E..
c in \(\frac{r^3}{c}\) must be 's'..
so we have to find if \(\frac{r^3}{s}\) is a terminating decimal...
the value depends on the denominator in its simplified form..
lets see the statements..
(1) r \(\geq\) 5
it just tell us that r cannot br 2 and 3 nothing else..
insuff
(2) s = 75
the denominator is 75...
if the numerator is 3 it will be a terminating decimal, otherwise not...
insuff..
combined we know numerator does not have 3, so it will not be a terminating decimal, as we have 3 in denominator..
suff
C
I am sorry I am slightly confused with the explanation. As far as my understanding goes, if the denominator has any other prime number in prime factorisation other than 2 and 5 and if that prime number can be cancelled with the numerator, then the fraction is terminating, otherwise not.
Here, the numerator is >or = to 5 i.e. it could also be 6 or 9 or 12 and those cases the 3 in the denominator will get cancelled. Therefore, there is no way to know what the value of r could be. Hence, my answer was E.
Kindly explain.
