GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 22 Feb 2019, 08:33

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.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in February
PrevNext
SuMoTuWeThFrSa
272829303112
3456789
10111213141516
17181920212223
242526272812
Open Detailed Calendar
  • Free GMAT RC Webinar

     February 23, 2019

     February 23, 2019

     07:00 AM PST

     09:00 AM PST

    Learn reading strategies that can help even non-voracious reader to master GMAT RC. Saturday, February 23rd at 7 AM PT
  • FREE Quant Workshop by e-GMAT!

     February 24, 2019

     February 24, 2019

     07:00 AM PST

     09:00 AM PST

    Get personalized insights on how to achieve your Target Quant Score.

In how many ways can N students be seated in a row with N seats?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

 
Manager
Manager
avatar
P
Joined: 17 May 2017
Posts: 131
Schools: ESSEC '20
GPA: 3
Reviews Badge
In how many ways can N students be seated in a row with N seats?  [#permalink]

Show Tags

New post Updated on: 13 Jun 2017, 04:42
1
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

58% (01:23) correct 42% (01:16) wrong based on 306 sessions

HideShow timer Statistics

In how many ways can N students be seated in a row with N seats?

(1) |N − 6| = 3
(2) N^2 = 7N + 18

Originally posted by haardiksharma on 13 Jun 2017, 03:36.
Last edited by Bunuel on 13 Jun 2017, 04:42, edited 1 time in total.
Renamed the topic and edited the question.
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 53067
Re: In how many ways can N students be seated in a row with N seats?  [#permalink]

Show Tags

New post 13 Jun 2017, 04:45
In how many ways can N students be seated in a row with N seats?

The answer to the question would be factorial of N, so N!, which means that the only thing we need to know is the value of N itself.

(1) |N − 6| = 3 --> N = 9 or N = 3. Not sufficient.

(2) N^2 = 7N + 18 --> N = -2 or N = 9. Since the number of students cannot be negative, then N = 9 only. Sufficient.

Answer: B.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Intern
Intern
avatar
B
Joined: 30 Apr 2017
Posts: 34
Re: In how many ways can N students be seated in a row with N seats?  [#permalink]

Show Tags

New post 23 Jan 2019, 19:45
(1) |N − 6| = 3 -->N -6 = +/- 3 --> N = 9 or N = 3. two numbers...

(2) N^2 = 7N + 18 --> N = -2 or N = 9. Since the number of students cannot be negative, thus N = 9 only. Sufficient.

answer B.
GMAT Club Bot
Re: In how many ways can N students be seated in a row with N seats?   [#permalink] 23 Jan 2019, 19:45
Display posts from previous: Sort by

In how many ways can N students be seated in a row with N seats?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.