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

It is currently 18 Oct 2018, 03:19

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

Veritas Prep 10 Year Anniversary Promo Question #9

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

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49992
Re: Veritas Prep 10 Year Anniversary Promo Question #9  [#permalink]

Show Tags

New post 22 Sep 2012, 08:52

We have a winner!



Winner:

devopam

Official Explanation:

Answer is E

This question can be made significantly easier by first previewing the answer choices. Choices A and B are 11 apart, and choice C is 99 away from choice A on the number line. Therefore, those choices are all separated by multiples of 11, and if one of them is divisible by 11, then so are the others. Choice D may be better viewed by simply looking at the number. D comes out to 114444, which is 110000 (a multiple of 11) plus 4400 (another multiple of 11) plus 44 (another multiple of 11). Choice E is the answer that doesn’t fit. It’s 99,999 away from choice A, for example – not separated by a multiple of 11 (99000 + 990 + 9, not a multiple of 11).

Note that this question can be solved by simply checking out each answer choice and dividing by 11, as well. But a keen understanding of the number line and factors/multiples may make this question quicker for you.
_________________

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

Senior Manager
Senior Manager
User avatar
B
Joined: 03 Sep 2012
Posts: 382
Location: United States
Concentration: Healthcare, Strategy
GMAT 1: 730 Q48 V42
GPA: 3.88
WE: Medicine and Health (Health Care)
Re: Veritas Prep 10 Year Anniversary Promo Question #9  [#permalink]

Show Tags

New post 01 Oct 2012, 03:27
Rule to check the divisibility by 11 : If the difference of the sum of its digits in odd places and the sum of the digits in even places is either 0 or multiple of 11…then a number is divisible by 11

Option A : No comes out to be 14443 , Here odd place digits are 1 4 and 3 , and even placed digits are 4 and 4 .. So the difference is ZERO , therefore the number is divisible by 11 ..

We can work all the way down the list of answers given until we arrive to a number that is not divisible by 11 ...

- 85556 (N - 100,000) , the difference between the no comes out to be neither ZERO nor divisible by 11.. (E)
_________________

"When you want to succeed as bad as you want to breathe, then you’ll be successful.” - Eric Thomas

Intern
Intern
User avatar
B
Joined: 23 Sep 2017
Posts: 19
Re: Veritas Prep 10 Year Anniversary Promo Question #9  [#permalink]

Show Tags

New post 26 Oct 2017, 08:57
We can remember that:
For 10^x
If x is even => x divide 11, remaining 1
If x is odd for example 1000, 10^5, x divide 11, remaining 10
In this question 14444 divide x, remaining 1 => A, B ,C, D is divisible by 11
Answer: E
GMAT Club Bot
Re: Veritas Prep 10 Year Anniversary Promo Question #9 &nbs [#permalink] 26 Oct 2017, 08:57

Go to page   Previous    1   2   [ 23 posts ] 

Display posts from previous: Sort by

Veritas Prep 10 Year Anniversary Promo Question #9

  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®.