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

It is currently 20 Oct 2018, 05:53
Register
GMAT Club Tests
Decision Tracker
My Rewards
New posts
Unanswered

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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel

For any two numbers a and b, the operation a#b is given by the express

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
  Sort by Date Sort by Kudos  
Search for:
 
Print view
First unread post
Author Message
TAGS:

Hide Tags
Senior Manager
Senior Manager
User avatar
P
Joined: 08 Jun 2013
Posts: 448
Location: India
Schools: INSEAD Jan '19
GMAT 1: 200 Q1 V1
GPA: 3.82
WE: Engineering (Other)
GMAT ToolKit User Premium Member
For any two numbers a and b, the operation a#b is given by the express  [#permalink]

Show Tags

New post 04 Oct 2018, 11:07
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

100% (01:03) correct 0% (00:00) wrong based on 22 sessions

HideShow timer Statistics

For any two numbers a and b, the operation a#b is given by the expression \(a^2 + 6ab + b^2\). If a#1 = -7, then a could be equal to

A) -3
B) -1
C) -4
D) 2
E) 4
Spoiler: OA

_________________

It seems Kudos button not working correctly with all my posts...

Please check if it is working with this post......

is it?....

Anyways...Thanks for trying :cool:

Senior Manager
Senior Manager
avatar
S
Joined: 19 Oct 2013
Posts: 314
Location: Kuwait
GPA: 3.2
WE: Engineering (Real Estate)
GMAT ToolKit User
Re: For any two numbers a and b, the operation a#b is given by the express  [#permalink]

Show Tags

New post 04 Oct 2018, 11:33
Harshgmat wrote:
For any two numbers a and b, the operation a#b is given by the expression \(a^2 + 6ab + b^2\). If a#1 = -7, then a could be equal to

A) -3
B) -1
C) -4
D) 2
E) 4


\(a^2 + 6a + 1 = -7\)

\(a^2 + 6a + 8 = 0\)

\((a+4) (a+2) = 0\)

\(a = -2\) or \(-4\)

Answer choice C

You could do it by backsolving and picking a number from the answer choice.

If we try a = -4

then \((-4)^2 + 6 * -4 * 1 + 1 = 16 -24 + 1 = -7\)
GMAT Club Bot
Re: For any two numbers a and b, the operation a#b is given by the express &nbs [#permalink] 04 Oct 2018, 11:33
Print view
First unread post
Display posts from previous: Sort by

For any two numbers a and b, the operation a#b is given by the express

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: chetan2u, Bunuel, VeritasKarishma, niks18, generis

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions