It is currently 20 Nov 2018, 04:00
My Tests

Close

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

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 GMAT 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.

x^3 = n. If the units digit of n is a prime number, then ind

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
Joined: 20 May 2014
Posts: 282
Followers: 14

Kudos [?]: 49 [0], given: 220

CAT Tests
x^3 = n. If the units digit of n is a prime number, then ind [#permalink] New post 05 Nov 2017, 01:55
00:00

Question Stats:

0% (00:00) correct 100% (00:07) wrong based on 4 sessions
x^3 = n. If the units digit of n is a prime number, then indicate each of the following that could be the value of x.



[A] 1

[B] 2

[C] 3

[D] 5

[E] 7

[F] 8

[G] 9

Kudos for correct solution.

[Reveal] Spoiler: OA
[C], [D], [E], [F]
[Reveal] Spoiler: OA
Director
Director
Joined: 03 Sep 2017
Posts: 521
Followers: 1

Kudos [?]: 327 [0], given: 66

Re: x^3 = n. If the units digit of n is a prime number, then ind [#permalink] New post 05 Nov 2017, 03:08
One digit prime numbers are 2, 3, 5 and 7. Thus, we should try which of the choices to the third power results in a unit digit equal to these four numbers.

This is the case for 3 (3^3 = 27), 5 (5^3 = 125), 7 (7^3 = 343) and 8 (8^3 = 512). Answers C, D, E and F
Re: x^3 = n. If the units digit of n is a prime number, then ind   [#permalink] 05 Nov 2017, 03:08
Display posts from previous: Sort by

x^3 = n. If the units digit of n is a prime number, then ind

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.