Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 27 Mar 2015, 18:17

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In a certain conference room each row of chairs has the same

Author Message
TAGS:
Manager
Joined: 04 Apr 2007
Posts: 130
Followers: 1

Kudos [?]: 9 [0], given: 0

In a certain conference room each row of chairs has the same [#permalink]  13 Apr 2007, 21:03
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
In a certain conference room each row of chairs has the same number of chairs, and the number of rows is 1 less than the number of chairs in a row. How many chairs are in a row?

1) There is a total of 72 chairs
2) After 1 chair is removed from the last row, there is a total of 17 chairs in the last 2 rows

Director
Joined: 13 Dec 2006
Posts: 521
Location: Indonesia
Followers: 6

Kudos [?]: 102 [0], given: 0

Since you already got answer through 2) as u chose B, I will solve for 1)

suppose conference room has X rows, so the number of chairs in each row will be X+1.

from 1) we have X(X+1) = 72... or X^2 + X - 72 = 0

solving the quadratic equation we have X = -9 or 8... now -9 is not possible hence X = 8... so 1) is also sufficient.

regards,

Amardeep
Similar topics Replies Last post
Similar
Topics:
6 In a certain conference room each row of chairs has the same 2 20 Mar 2012, 09:30
In a certain conference room each row of chairs has the same 3 13 Jan 2008, 08:36
In a certain conference room each row of chairs has the same 1 28 Dec 2007, 04:01
2 In a certain conference room each row of chairs has the same 7 01 Oct 2007, 21:29
3 In a certain conference room, each row of chairs has the 3 15 Apr 2006, 14:25
Display posts from previous: Sort by