Author 
Message 
TAGS:

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 44290

Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:00
Question Stats:
58% (01:23) correct 42% (01:09) wrong based on 283 sessions
HideShow timer Statistics
Veritas Prep 10 Year Anniversary Promo Question #9 One quant and one verbal question will be posted each day starting on Monday Sept 17th at 10 AM PST/1 PM EST and the first person to correctly answer the question and show how they arrived at the answer will win a free Veritas Prep GMAT course ($1,650 value). Winners will be selected and notified by a GMAT Club moderator. For more questions and details please check here: veritasprep10yearanniversarygiveaway138806.htmlTo participate, please make sure you provide the correct answer (A,B,C,D,E) and explanation that clearly shows how you arrived at it. Winners will be announced the following day at 10 AM Pacific/1 PM Eastern Time. If n = 14,444, which of the following operations will not yield a number that is divisible by 11?A) n  1 B) n + 10 C) n  100 D) n + 100,000 E) n  100,000
Official Answer and Stats are available only to registered users. Register/ Login.
_________________
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? Extrahard Quant Tests with Brilliant Analytics





Math Expert
Joined: 02 Sep 2009
Posts: 44290

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:00
1
This post received KUDOS
Expert's post
1
This post was BOOKMARKED
We have a winner! Winner: devopamOfficial Explanation: Answer is EThis 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? Extrahard Quant Tests with Brilliant Analytics



Senior Manager
Joined: 24 Aug 2009
Posts: 489
Schools: Harvard, Columbia, Stern, Booth, LSB,

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:01
Answer is D. sum of alternate digits is 8 & 9 All will give 8 & 8 leaving d
_________________
If you like my Question/Explanation or the contribution, Kindly appreciate by pressing KUDOS. Kudos always maximizes GMATCLUB worth Game Theory
If you have any question regarding my post, kindly pm me or else I won't be able to reply



Intern
Joined: 31 Oct 2011
Posts: 45
Concentration: General Management, Entrepreneurship
GPA: 3.4
WE: Accounting (Commercial Banking)

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:03
n = 14,444 divided by 11 has the reminder of 1. Therefore, only (D) isn't dividable by 11 (D) is my answer



Intern
Joined: 20 Sep 2012
Posts: 5

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:04
Ans is D..... number has remainder 1 when divided by 11
Last edited by Manjulika on 21 Sep 2012, 10:05, edited 1 time in total.



Intern
Status: gmat fresher
Joined: 07 Jun 2012
Posts: 25
GPA: 3.87

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:04
2
This post received KUDOS
Ans is E E.n100000 14,444100000/11not possible



Intern
Joined: 05 Jun 2012
Posts: 22

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:05
Answer E.
All others are divisible by 11.



Intern
Joined: 24 Aug 2012
Posts: 23
Location: India

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:05
Divisibility rules for 11 require difference between sum of odd and even places to be divisible by 11 For n=14444, this is 98 = 1 only operation D n=100000, doesnt give a number divisible by 11. Hence answer is D



Manager
Joined: 20 Sep 2012
Posts: 51
Concentration: Finance, Entrepreneurship
GPA: 3.37
WE: Analyst (Consulting)

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:05
1
This post received KUDOS
1
This post was BOOKMARKED
14444/11 => the remainder = 1. A. 11 =0 => remainder = 0 B. 1 + 10 =11 => remainder = 0 C. 1  100 = 99 => remainder =0 D. 1 + 100000 = 100001 which is divisible by 11 E. Correct
Last edited by monsama on 21 Sep 2012, 10:19, edited 2 times in total.



Intern
Joined: 31 Mar 2011
Posts: 5

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:06
Ans is E 14443 is divisible by 11.
Hence, A) n  1 is div by 11 B) n + 10 is div by 11 C) n  100 =n1  99 is div by 11 D) n + 100,000 is div by 11 E) n  100,000 = 85556 when divided by 11 yields a remainder of 9



Intern
Joined: 13 Sep 2012
Posts: 5

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:09
D (1+4+4)  3*4=3 which is not divisible by 11



Manager
Joined: 24 Jul 2011
Posts: 75
Location: India
Concentration: Strategy, General Management
WE: Asset Management (Manufacturing)

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:12
Answer is E A) n  1 >>divisible by 11 B) n + 10 >>divisible by 11 C) n  100 >>divisible by 11 D) n + 100,000 >>divisible by 11 E) n  100,000 >> not >>divisible by 11
_________________
My mantra for cracking GMAT: Everyone has inborn talent, however those who complement it with hard work we call them 'talented'.
+1 Kudos = Thank You Dear Are you saying thank you?



Manager
Status: Prevent and prepare. Not repent and repair!!
Joined: 13 Feb 2010
Posts: 242
Location: India
Concentration: Technology, General Management
GPA: 3.75
WE: Sales (Telecommunications)

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:12
The Answer is E. E is not divisible
_________________
I've failed over and over and over again in my life and that is why I succeedMichael Jordan Kudos drives a person to better himself every single time. So Pls give it generously Wont give up till i hit a 700+



Intern
Joined: 08 Sep 2012
Posts: 3

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:19
If we follow the divisibility rule of 11 we know that the first four is divisible by 11.
E is not divisible by 11 because 14,444100,000 =  85,556
This number is not divisible by 11 so the correct answer is E.



Intern
Joined: 16 Dec 2011
Posts: 13

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:24
E for a number N, the alternate digits should be equal. Ex: for N=abcd; (a+c)(b+d)=0



Intern
Joined: 17 Aug 2012
Posts: 2

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:26
sdpp143 wrote: Ans is E E.n100000 14,444100000/11not possible Finally u did it



Manager
Joined: 31 Mar 2010
Posts: 129

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 10:34
Quote: To participate, please make sure you provide the correct answer (A,B,C,D,E) and explanation that clearly shows how you arrived at it. Winners will be announced the following day at 10 AM Pacific/1 PM Eastern Time.[/textarea]
If n = 14,444, which of the following operations will not yield a number that is divisible by 11?
A) n  1 B) n + 10 C) n  100 D) n + 100,000 E) n  100,000
Rule: any number to be divisible by 11 the sum of digits at odd places  the sum of digits at even place should either be zero or divisible by 11. A) n  1 = 14443 > (1+4+3)  (4+4) = 0 B) n + 10 = 14454 > (1+4+4)  (4+5) = 0 C) n  100 = 14344 > (1+3+4)  (4+4) = 0 D) n + 100,000 = 114444 > (1+4+4)  (1+4+4) = 0 E) n  100,000 =  85556 > (8+5+6)  (5+5) = 9 >not divisible by 11 Ans E.
_________________
Push +1 kudos button please, if you like my post



Manager
Joined: 14 Feb 2012
Posts: 55
Location: United States
WE: Project Management (Consulting)

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 11:31
Answer E:
If n = 14,444, which of the following operations will not yield a number that is divisible by 11?
A) n  1 B) n + 10 C) n  100 D) n + 100,000 E) n  100,000[/quote]
My approch was to solve the question first.
n = 14444 and we need to find value which will not be divisible by 11. check for 14444 first. 14444/11 gives remainder of 1
so option 1 => n 1 will be divisible option 2 => n +10 will be divisible option 3 => n 100 = n  1  99 => n  1 and 99 both are divisible by 11. Hence n  100 will be divisible option 4 => n +100000 => n + 10 + 99990 => n+10 and 99990 both are divisible by 11. hence n+100000 will be divisible option 5 => n 100000 will not be divisible (you can conclude either directly or can calculate the same way) n  1  99999 = > n1 is divisibe and 99990 is divisible but not 99999. 99999 will give a remainder of 9.



Manager
Joined: 08 Jun 2012
Posts: 108
Location: United States
Concentration: Marketing, Other
GMAT 1: 550 Q30 V36 GMAT 2: 660 Q41 V40 GMAT 3: 670 Q44 V38
GPA: 3.27
WE: Corporate Finance (Mutual Funds and Brokerage)

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 12:23
The answer is E. a. 14,443/11 = 1313 b. 14,454/11 = 1314 c. 14,344/11 = 1304 d. 114,444 = 10404 e. 85,556 is not divisible by 11. Thanks for this opportunity!!
_________________
"You may not realize it when it happens, but a kick in the teeth may be the best thing in the world for you."  Walt Disney



Current Student
Joined: 12 Jan 2012
Posts: 26

Re: Veritas Prep 10 Year Anniversary Promo Question #9 [#permalink]
Show Tags
21 Sep 2012, 23:22
Answer E Look at only D and E  Since we are adding and subtracting the same 100000 and 100000 is not divisible by 11 the answer would be one of the 2. Now, in D apply the alternate digit sum test (Difference of odd and even sum should be 0 or divisible by 11) Sum = 114444 Even sum = 9 Odd sum = 9 Difference = 0 So, D eliminated and E is the answer




Re: Veritas Prep 10 Year Anniversary Promo Question #9
[#permalink]
21 Sep 2012, 23:22



Go to page
1 2
Next
[ 24 posts ]



