Forum Home > GMAT > Quantitative > Problem Solving (PS)
Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Dec 1410:00 AM EST
-12:00 PM EST
Think a 100% GMAT Verbal score is out of your reach? Target Test Prep will make you think again! Our course uses techniques such as topical study and spaced repetition to maximize knowledge retention and make studying simple and fun.
Dec 1411:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- Dec 15
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Dec 1608:00 AM PST
-11:59 PM PST
GMAT Club 12 Days of Christmas is a 4th Annual GMAT Club Winter Competition based on solving questions. This is the Winter GMAT competition on GMAT Club with an amazing opportunity to win over $40,000 worth of prizes!- Dec 17
09:00 AM PST
-10:00 AM PST
Join Manhattan Prep instructor Whitney Garner for a fun—and thorough—review of logic-based (non-math) problems, with a particular emphasis on Data Sufficiency and Two-Parts. - Dec 18
10:00 AM PST
-11:00 AM PST
Here is the essential guide to securing scholarships as an MBA student! In this video, we explore the various types of scholarships available, including need-based and merit-based options.
17 Jan 2016, 10:42
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
78% (00:52) correct
22%
(01:08)
wrong
based on 64
sessions
History
Date
Time
Result
Not Attempted Yet
How many brothers does David have?
(1) His parents have seven surviving children.
(2) He has twice as many sisters as brothers.
(1) His parents have seven surviving children.
(2) He has twice as many sisters as brothers.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
paidlukkha
Joined: 11 Nov 2014
Last visit: 21 Apr 2017
Posts: 263
Own Kudos:
Given Kudos: 17
Location: India
Concentration: Finance, International Business
Schools: ISB '18 Great Lakes '18 SPJ PGPM"17 LBS '18 NTU '18 NUS '18
WE:Project Management (Telecommunications)
17 Jan 2016, 11:59
Kudos
Bookmarks
A perfect C trap....surviving makes the change
Answer E
Answer E
Updated on: 01 Aug 2016, 06:28
Originally posted by LogicGuru1 on 01 Aug 2016, 06:25.
Last edited by LogicGuru1 on 01 Aug 2016, 06:28, edited 1 time in total.
Last edited by LogicGuru1 on 01 Aug 2016, 06:28, edited 1 time in total.
Kudos
Bookmarks
Bunuel
How many brothers does David have?
(1) His parents have seven surviving children.
(2) He has twice as many sisters as brothers.
(1) His parents have seven surviving children.
(2) He has twice as many sisters as brothers.
FIND THE NUMBER OF DAVE'S BROTHERS
(1) His parents have seven surviving children.
This statement gives us the total number of siblings
Total siblings:- Dave + 6 sibling =7 {Except dave all can be males or females or any other possibility}
INSUFFICIENT
(2) He has twice as many sisters as brothers.
This statement gives us the ratio of brothers and sisters of Dave
Total siblings = Dave + 2x sisters+x brothers {x can be any positive integer }
INSFFICIENT
Merge both
dave + 2x+x=7
1+3x=7
3x=7-1
3x=6
x=2
Number of brother DAVE have =2
SUFFICIENT
ANSWER C
