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

It is currently 01 Aug 2014, 08:01

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Arithmetic

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 11 Jul 2009
Posts: 15
Followers: 0

Kudos [?]: 0 [0], given: 1

Arithmetic [#permalink] New post 12 Jul 2009, 05:58
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
in certain pegboard, each row of holes other than the bottom one contains exactly one more hole than the row below it. if there are 4 rows in all and 26 holes in the pegboard, how many holes are in bottom row?
1)4 2) 5 3) 6 4)7 5)8
Intern
Intern
avatar
Joined: 11 Jul 2009
Posts: 7
Location: Delhi
Followers: 0

Kudos [?]: 1 [0], given: 0

Re: Arithmetic [#permalink] New post 12 Jul 2009, 08:40
Ans would be 2) 5..

Let's consider the bottom row has x holes..
So , x + (x + 1) + (x + 2) + (x + 3) = 26
.. , 4x + 6 = 26
So , x = 5
Intern
Intern
avatar
Joined: 11 Jul 2009
Posts: 15
Followers: 0

Kudos [?]: 0 [0], given: 1

Re: Arithmetic [#permalink] New post 12 Jul 2009, 13:31
yep right. I went by backsolving by starting with 6 first. i.e 6+7+8+9 =30. So opted for 5. now its 5+6+7+8=26 holes & 4 rows
Intern
Intern
avatar
Joined: 05 Sep 2006
Posts: 17
Followers: 0

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

Re: Arithmetic [#permalink] New post 13 Jul 2009, 11:13
I didnt read the question properly and added 3 to the answer 5.. reminds me to read carefully.
Senior Manager
Senior Manager
avatar
Joined: 16 Apr 2009
Posts: 252
Schools: Ross
Followers: 1

Kudos [?]: 19 [0], given: 10

GMAT Tests User
Re: Arithmetic [#permalink] New post 13 Jul 2009, 11:35
Quote:
in certain pegboard, each row of holes other than the bottom one contains exactly one more hole than the row below it. if there are 4 rows in all and 26 holes in the pegboard, how many holes are in bottom row?
1)4 2) 5 3) 6 4)7 5)8


4 rows
3 rows - n+(n+1)+(n+2)
Let x be the no of holes in the bottom row

n+(n+1)+(n+2)+x=26
3n+3+x=26
3n+x=23

23 -3(5 -no of holes)=23-15=8
23 -3(6 -no of holes)=23-18=5

Hence 5
_________________

Keep trying no matter how hard it seems, it will get easier.

Re: Arithmetic   [#permalink] 13 Jul 2009, 11:35
    Similar topics Author Replies Last post
Similar
Topics:
Arithmetic virtualanimosity 4 06 Nov 2009, 05:30
Arithmetic gmatraj 2 10 Sep 2009, 02:15
Arithmetic virtualanimosity 1 09 Sep 2009, 13:02
1 arithmetic virtualanimosity 6 20 Aug 2009, 13:48
Arithmetic shehreenquayyum 1 29 Jul 2006, 12:01
Display posts from previous: Sort by

Arithmetic

  Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.