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

It is currently 15 Jan 2019, 19:58

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
Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • $450 Tuition Credit & Official CAT Packs FREE

     January 15, 2019

     January 15, 2019

     10:00 PM PST

     11:00 PM PST

    EMPOWERgmat is giving away the complete Official GMAT Exam Pack collection worth $100 with the 3 Month Pack ($299)
  • The winning strategy for a high GRE score

     January 17, 2019

     January 17, 2019

     08:00 AM PST

     09:00 AM PST

    Learn the winning strategy for a high GRE score — what do people who reach a high score do differently? We're going to share insights, tips and strategies from data we've collected from over 50,000 students who used examPAL.

If C and D are unique integers, does C = 0?

  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: 52108
If C and D are unique integers, does C = 0?  [#permalink]

Show Tags

New post 17 Feb 2015, 08:17
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

66% (01:14) correct 34% (01:13) wrong based on 171 sessions

HideShow timer Statistics

CEO
CEO
User avatar
P
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2722
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Reviews Badge
Re: If C and D are unique integers, does C = 0?  [#permalink]

Show Tags

New post 17 Feb 2015, 10:36
Bunuel wrote:
If C and D are unique integers, does C = 0?

(1) CD = C^2
(2) D = 4

Kudos for a correct solution.


Question : Is C=0 ?

Statement 1: CD = C^2
Since C and D are Integers therefore the above equation can be re-written as

C (C-D) =0
i.e. either C=0 or C=D
but Since C and D are distinct therefore C can't be equal to D
therefore , C= 0
SUFFICIENT

Statement 2: D = 4
i.e. C can be any Integer value other than 4, But this doesn't provide us any unique value therefore
NOT SUFFICIENT

Answer: Option
_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Manager
Manager
avatar
Status: Applied
Joined: 02 May 2014
Posts: 133
Location: India
Concentration: Operations, General Management
GMAT 1: 690 Q47 V38
GPA: 3.35
WE: Information Technology (Computer Software)
Re: If C and D are unique integers, does C = 0?  [#permalink]

Show Tags

New post 17 Feb 2015, 22:16
1
IS C=0? A=> c^2-CD=0 and C not equal to D that implies Cmust be 0 Hence sufficient .. Statement2 tells D=4 not sufficient Hence A.
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 52108
Re: If C and D are unique integers, does C = 0?  [#permalink]

Show Tags

New post 22 Feb 2015, 10:33
Bunuel wrote:
If C and D are unique integers, does C = 0?

(1) CD = C^2
(2) D = 4



Kudos for a correct solution.


VERITAS PREP OFFICIAL SOLUTION

Correct Answer: A

From statement 1, we know that, if C was NOT 0, the equation could be manipulated to tell us that D = C. Since the question says that is not possible, we know that C must be 0, so statement 1 is sufficient. Statement 2 only tells us that C is not 4. C could be 0, but it could also be anything else with the exception of 4. A is the correct answer.
_________________

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

Intern
Intern
avatar
Joined: 15 Jan 2015
Posts: 23
Re: If C and D are unique integers, does C = 0?  [#permalink]

Show Tags

New post 22 Feb 2015, 20:59
If C and D are unique integers, does C = 0?

(1) CD = C^2
(2) D = 4



State (1) C*D = C*C
C is not equal to D So, C=0
Sufficient

State(2) Not sufficient

Answer - A
Intern
Intern
avatar
Joined: 30 Oct 2010
Posts: 48
GMAT ToolKit User Premium Member Reviews Badge
Re: If C and D are unique integers, does C = 0?  [#permalink]

Show Tags

New post 22 Sep 2015, 10:37
C and D are unique .so C is not equal to D

option1: CxD=C^2 to achive this only possibilty is D=-C.here both are unique and their product gives C^2
Here C cant be zero as if c=0,the CD= C^2=0

Option2: D=4..Not sufficient

Hence answer is 'A'
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 9405
Premium Member
Re: If C and D are unique integers, does C = 0?  [#permalink]

Show Tags

New post 30 Mar 2017, 13:33
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

GMAT Club Bot
Re: If C and D are unique integers, does C = 0? &nbs [#permalink] 30 Mar 2017, 13:33
Display posts from previous: Sort by

If C and D are unique integers, does C = 0?

  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®.