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

It is currently 23 Jul 2014, 00:43

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

Question about challenge Q explanation

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
User avatar
Joined: 18 Apr 2007
Posts: 122
Followers: 1

Kudos [?]: 5 [0], given: 0

GMAT Tests User
Question about challenge Q explanation [#permalink] New post 17 May 2007, 09:31
The question is: "How many three-digit numbers are there, so that each is evenly divisible by 7?"

The explanation listed out 4 easy steps to find the answer:
1. Find the highest and lowest multiples within the range
2. Find the positive difference of these two numbers
3. Divide the difference by the number in the question (in this case, 7)
4. Add +1

My question is: Does this work all the time? How reliable are these steps with different questions?

Thanks for the help!

Bluebird
Senior Manager
Senior Manager
User avatar
Joined: 03 May 2007
Posts: 279
Followers: 1

Kudos [?]: 7 [0], given: 0

GMAT Tests User
 [#permalink] New post 17 May 2007, 09:50
it should work all the time

let's find all three digit numbers that are divisible by 9

99+9 is the lowest number =12*9
999 is the highest number =111*9
total of three digit numbers is equal to 111-12+1=100
Manager
Manager
User avatar
Joined: 30 Mar 2007
Posts: 222
Followers: 1

Kudos [?]: 2 [0], given: 0

GMAT Tests User
 [#permalink] New post 17 May 2007, 11:29
yes it will as explained by cool
  [#permalink] 17 May 2007, 11:29
    Similar topics Author Replies Last post
Similar
Topics:
question explanation Adigmat 0 23 Nov 2009, 11:37
Challenges Question IHATEMELGIBSON1 0 03 Apr 2007, 16:27
not determinable questions- challenge 3 Q19 ugo_castelo 1 22 Aug 2006, 10:41
Online Challenges explanation Nans_baby 4 31 Mar 2006, 03:33
Are questions about the Challenge supposed to wait until the hilairity 1 22 Dec 2004, 14:04
Display posts from previous: Sort by

Question about challenge Q explanation

  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®.