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

It is currently 30 Sep 2014, 20:04

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

GMAT Diagnostic Test Question 12

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 24 Apr 2010
Posts: 62
Followers: 1

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

Re: GMAT Diagnostic Test Question 11 [#permalink] New post 03 Sep 2010, 08:57
i think unless premeditated....it would be very difficult to get this right with in 2 minutes...it took me more than 2 minutes still i got it wrong because i think there are too many cases to check and too many exceptions....
is it spoiling the test....poll may give better view....with how many got it right...
thanks
Manager
Manager
User avatar
Joined: 15 Apr 2010
Posts: 170
Followers: 4

Kudos [?]: 29 [0], given: 3

Re: GMAT Diagnostic Test Question 11 [#permalink] New post 09 Oct 2010, 02:54
I did not consider "0" in either case.... My bad! :(
Intern
Intern
avatar
Joined: 25 Oct 2010
Posts: 18
Followers: 0

Kudos [?]: 2 [0], given: 1

Re: GMAT Diagnostic Test Question 11 [#permalink] New post 01 Nov 2010, 20:41
I would beg to differ on the official answer 'C'...as the Question states.

N = 1234@ and @ represents the units digit, is N a multiple of 5?

(1) @! is not divisible by 5
(2) @ is divisible by 9

(1)@! is not divisible by 5 so @ cannot be 0 or 5==> N is not a multiple of 5==> can answer the question
(2)@ is divisible by 9 so @ is 0 or 9; if it is 0 ==> N is a multiple of 5; if @ is 9 N is not a multiple of 5==>Not sufficient!

I choose A
Please give me your comments or feedvack on this one.
Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 23064
Followers: 3538

Kudos [?]: 27244 [0], given: 2725

Re: GMAT Diagnostic Test Question 11 [#permalink] New post 01 Nov 2010, 22:49
Expert's post
soundofmusic wrote:
I would beg to differ on the official answer 'C'...as the Question states.

N = 1234@ and @ represents the units digit, is N a multiple of 5?

(1) @! is not divisible by 5
(2) @ is divisible by 9

(1)@! is not divisible by 5 so @ cannot be 0 or 5==> N is not a multiple of 5==> can answer the question
(2)@ is divisible by 9 so @ is 0 or 9; if it is 0 ==> N is a multiple of 5; if @ is 9 N is not a multiple of 5==>Not sufficient!

I choose A
Please give me your comments or feedvack on this one.


Red part is not correct.

1233@ to be divisible by 5 symbol @ should represent either 0 or 5. So the question asks whether @ equals to 0 or 5.

(1) @! is not divisible by 5 --> @ can be 0, 1, 2, 3, or 4 (note that 0!=1). Not sufficient.
(2) @ is divisible by 9 --> @ can be 0 or 9 (note that zero is divisible by every integer except zero itself). Not sufficient.

(1)+(2) Intersection of the values for @ from (1) and (2) is @=0. Sufficient.

Answer: C.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

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?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Senior Manager
Senior Manager
avatar
Joined: 11 Apr 2011
Posts: 268
Followers: 27

Kudos [?]: 226 [0], given: 13

GMAT ToolKit User
Re: GMAT Diagnostic Test Question 11 [#permalink] New post 19 May 2011, 05:25
How can 4 be a possibility of "@"? 4! results in 24 and the question clearly states that "@" is a "ones digit" so you cant plug in 24 as a "ones digit" so the option narrows down to 0,1,2, or 3. Doesn't it? :?
_________________

Powerscore CR Bible Full Chapter Notes | Easily Extend Vocabulary List with Google Dictionary

Please kudo me if you found my post useful. Thanks!!! :)

Intern
Intern
avatar
Joined: 31 Jul 2011
Posts: 1
Followers: 0

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

Re: GMAT Diagnostic Test Question 11 [#permalink] New post 13 Aug 2011, 17:27
i am still trying to grasp why for statement 2 to be correct, @ has to be 9? When you plug in 9, N is not divisible by 9, only 8 is!
Am I just missing something here? Are there any quick trick to divisibility that I am not aware of?
Please explain.
Manager
Manager
avatar
Joined: 02 Jun 2011
Posts: 160
Followers: 1

Kudos [?]: 24 [0], given: 11

Re: GMAT Diagnostic Test Question 11 [#permalink] New post 30 Oct 2011, 03:48
ooops divisibility of 0!!
good !
divisible by 9, i thought it implied only 9 and got 'E'
Intern
Intern
avatar
Joined: 05 Aug 2011
Posts: 13
Followers: 0

Kudos [?]: 0 [0], given: 6

Re: GMAT Diagnostic Test Question 11 [#permalink] New post 20 Aug 2013, 19:03
chuyencao wrote:
N = 1234@ and @ represents the units digit, is N a multiple of 5?

(1) @! is not divisible by 5
(2) @ is divisible by 9

=======
(1)@! is not divisible by 5 so @ is not 0 or 5==> N is not a multiple of 5==> can answer the question
(2)@ is divisible by 9 so @ is 0 or 9; if it is 0 ==> N is a multiple of 5; if @ is 9 N is not a multiple of 5==>Not sufficiency!
I choose A
Please give me the feedback !


Hi- can anyone answer this? why is the answer not A?
Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 23064
Followers: 3538

Kudos [?]: 27244 [0], given: 2725

Re: GMAT Diagnostic Test Question 11 [#permalink] New post 21 Aug 2013, 02:24
Expert's post
T740qc wrote:
chuyencao wrote:
N = 1234@ and @ represents the units digit, is N a multiple of 5?

(1) @! is not divisible by 5
(2) @ is divisible by 9

=======
(1)@! is not divisible by 5 so @ is not 0 or 5==> N is not a multiple of 5==> can answer the question
(2)@ is divisible by 9 so @ is 0 or 9; if it is 0 ==> N is a multiple of 5; if @ is 9 N is not a multiple of 5==>Not sufficiency!
I choose A
Please give me the feedback !


Hi- can anyone answer this? why is the answer not A?


The red part is not correct: 0!=1, so from (1) @ can be 0.

Complete solution is here: gmat-diagnostic-test-question-79339-20.html#p811396

Hope it helps.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

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?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Re: GMAT Diagnostic Test Question 11   [#permalink] 21 Aug 2013, 02:24
    Similar topics Author Replies Last post
Similar
Topics:
1 Experts publish their posts in the topic Gmat og 12 diagnostic test aikomidori 4 18 Jan 2010, 05:46
12 Experts publish their posts in the topic GMAT Diagnostic Test Question 21 bb 6 06 Jun 2009, 21:59
2 Experts publish their posts in the topic GMAT Diagnostic Test Question 16 bb 12 06 Jun 2009, 21:33
19 Experts publish their posts in the topic GMAT Diagnostic Test Question 13 bb 23 06 Jun 2009, 21:14
27 Experts publish their posts in the topic GMAT Diagnostic Test Question 1 bb 30 05 Jun 2009, 21:30
Display posts from previous: Sort by

GMAT Diagnostic Test Question 12

  Question banks Downloads My Bookmarks Reviews Important topics  

Go to page   Previous    1   2   [ 29 posts ] 

Moderators: Bunuel, WoundedTiger



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®.