It is currently 17 Mar 2018, 21:19

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 June
Open Detailed Calendar

If r = (x+y)/2 and s = (x-y)/2, what is the value of r + s?

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

Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 44290
If r = (x+y)/2 and s = (x-y)/2, what is the value of r + s? [#permalink]

Show Tags

11 Nov 2017, 07:39
00:00

Difficulty:

35% (medium)

Question Stats:

67% (00:28) correct 33% (00:34) wrong based on 30 sessions

HideShow timer Statistics

If r = (x+y)/2 and s = (x-y)/2, what is the value of r + s?

(1) y = 4

(2) x = 6
[Reveal] Spoiler: OA

_________________
PS Forum Moderator
Joined: 25 Feb 2013
Posts: 1001
Location: India
GPA: 3.82
Re: If r = (x+y)/2 and s = (x-y)/2, what is the value of r + s? [#permalink]

Show Tags

11 Nov 2017, 07:55
Bunuel wrote:
If r = (x+y)/2 and s = (x-y)/2, what is the value of r + s?

(1) y = 4

(2) x = 6

$$r=\frac{x+y}{2}$$ and $$s=\frac{x-y}{2}$$ add the two equations

so $$r+s=\frac{x+y+x-y}{2} = x$$

so we need the value of $$x$$.

Statement 1: Insufficient

Statement 2: Sufficient

Option B
Re: If r = (x+y)/2 and s = (x-y)/2, what is the value of r + s?   [#permalink] 11 Nov 2017, 07:55
Display posts from previous: Sort by

If r = (x+y)/2 and s = (x-y)/2, what is the value of r + s?

 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®.