It is currently 21 Nov 2018, 02:36
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.

If a is the smallest prime number greater than 21 and b is t

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 4928
Followers: 74

Kudos [?]: 982 [0], given: 4518

CAT Tests
If a is the smallest prime number greater than 21 and b is t [#permalink] New post 03 Feb 2017, 01:41
Expert's post
00:00

Question Stats:

100% (00:26) correct 0% (00:00) wrong based on 18 sessions


If a is the smallest prime number greater than 21 and b is the largest prime number less than 16, then ab =

A) 299

B) 323

C) 330

D) 345

E) 351
[Reveal] Spoiler: OA

_________________

Get the 2 FREE GREPrepclub Tests

1 KUDOS received
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4722
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 91

Kudos [?]: 1630 [1] , given: 390

CAT Tests
Re: If a is the smallest prime number greater than 21 and b is t [#permalink] New post 12 Feb 2017, 16:19
1
This post received
KUDOS
Expert's post
Explanation

A prime number is any number that has no factors other than 1 and itself. It is wise to memorize the first 10 prime numbers before the GRE:

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97

If a is the smallest prime number greater than 21, it must be 23.

If b is the largest prime number less than 16, it must be 13.

Find ab:

\(23 \times 13 = 299\)

Hence option A is correct.
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Re: If a is the smallest prime number greater than 21 and b is t   [#permalink] 12 Feb 2017, 16:19
Display posts from previous: Sort by

If a is the smallest prime number greater than 21 and b is t

  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®.