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

It is currently 03 Aug 2015, 19:34
GMAT Club 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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Typical GMAT questions for Counting problems

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 29 Aug 2007
Posts: 110
Followers: 1

Kudos [?]: 3 [0], given: 0

Typical GMAT questions for Counting problems [#permalink] New post 14 Sep 2007, 06:45
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Guys ,

Can you please help me out and check my work below? I am trying to make sure I got these counting problems under control

Eg 1 . How many integers are between 51 and 107

( 107 - 51 ) + 1= 57

Eg 2 . How many integers are divisible by 3 between 100 - 200


First Integer divisible = 102
Last integer divisble = 198

3( 51 , 52 .... 66)

Number of integers ( 66 - 51) + 1 = 33

Eg 3 . What is the sum of integers between (100 and 200)

Total = Average * number of integers

Average = 100 + 200 / 2 = 150

Number of integers = ( 200 - 100) 100 + 1 = 101

Total = 101 * 150

any more counting problems , I should be aware of ?

Thanks a lot guys!!
Senior Manager
Senior Manager
avatar
Joined: 28 Jun 2007
Posts: 321
Followers: 1

Kudos [?]: 28 [0], given: 0

Re: Typical GMAT questions for Counting problems [#permalink] New post 14 Sep 2007, 07:49
beatgmat wrote:
Eg 2 . How many integers are divisible by 3 between 100 - 200

First Integer divisible = 102
Last integer divisble = 198

3( 51 , 52 .... 66)

Number of integers ( 66 - 51) + 1 =
33


The part in red is wrong but somehow you got the final answer right. 3 multiplied by 51 does not give 102. Also, 66 - 51 + 1 is not 33.

The correct calculation:

3(34, 35 .... 66)

Number of integers ( 66 - 34) + 1 = 33
Re: Typical GMAT questions for Counting problems   [#permalink] 14 Sep 2007, 07:49
Display posts from previous: Sort by

Typical GMAT questions for Counting problems

  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®.