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

 It is currently 17 Dec 2018, 06:37

# R1 Decisions:

Michigan Ross Chat (US calls are expected today)  |  UCLA Anderson Chat  (Calls expected to start at 7am PST; Applicants from Asia will hear first)

### 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

## Events & Promotions

###### Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• ### 10 Keys to nail DS and CR questions

December 17, 2018

December 17, 2018

06:00 PM PST

07:00 PM PST

Join our live webinar and learn how to approach Data Sufficiency and Critical Reasoning problems, how to identify the best way to solve each question and what most people do wrong.
• ### R1 Admission Decisions: Estimated Decision Timelines and Chat Links for Major BSchools

December 17, 2018

December 17, 2018

10:00 PM PST

11:00 PM PST

From Dec 5th onward, American programs will start releasing R1 decisions. Chat Rooms: We have also assigned chat rooms for every school so that applicants can stay in touch and exchange information/update during decision period.

# What is the value of b + c? (1) ab + cd + ac + bd = 6 (2) a + d = 4

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

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 51261
What is the value of b + c? (1) ab + cd + ac + bd = 6 (2) a + d = 4  [#permalink]

### Show Tags

23 Sep 2018, 20:41
00:00

Difficulty:

25% (medium)

Question Stats:

79% (01:01) correct 21% (01:20) wrong based on 66 sessions

### HideShow timer Statistics

What is the value of b + c?

(1) ab + cd + ac + bd = 6
(2) a + d = 4

_________________
Math Expert
Joined: 02 Aug 2009
Posts: 7107
Re: What is the value of b + c? (1) ab + cd + ac + bd = 6 (2) a + d = 4  [#permalink]

### Show Tags

24 Sep 2018, 04:08
What is the value of b + c?

(1) ab + cd + ac + bd = 6
Four variables, so we will not get our answer but let's simplify the equation..
$$ab+cd+ac+bd=6..........ab+ac+cd+bd=6.........a(b+c)+d (b+c)=6.........(a+d)(b+c)=6$$
Insufficient

(2) a + d = 4
Clearly insufficient

Combined
$$(a+d)(b+c)=6$$
So if a+d=4, 4*(c+b)=6......c+b=6/4=3/2
Sufficient

C
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html

GMAT online Tutor

CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2711
Location: India
GMAT: INSIGHT
WE: Education (Education)
Re: What is the value of b + c? (1) ab + cd + ac + bd = 6 (2) a + d = 4  [#permalink]

### Show Tags

24 Sep 2018, 04:20
Bunuel wrote:
What is the value of b + c?

(1) ab + cd + ac + bd = 6
(2) a + d = 4

Question: b+c = ?

Statement 1: ab + cd + ac + bd = 6
i.e. (a+d)*(b+c)=6
NOT SUFFICIENT

Statement 2: a + d = 4
NOT SUFFICIENT

Combining the two statements
(a+d)*(b+c)=6
i.e. b+c = 6/4
SUFFICIENT

Answer: Option C
_________________

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

Re: What is the value of b + c? (1) ab + cd + ac + bd = 6 (2) a + d = 4 &nbs [#permalink] 24 Sep 2018, 04:20
Display posts from previous: Sort by

# What is the value of b + c? (1) ab + cd + ac + bd = 6 (2) a + d = 4

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

 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®.