It is currently 17 Jan 2018, 22:20

### 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

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?

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 43314

Kudos [?]: 139342 [0], given: 12786

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

### Show Tags

11 Nov 2017, 06:39
00:00

Difficulty:

35% (medium)

Question Stats:

76% (00:30) correct 24% (00:40) wrong based on 25 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

_________________

Kudos [?]: 139342 [0], given: 12786

PS Forum Moderator
Joined: 25 Feb 2013
Posts: 810

Kudos [?]: 379 [0], given: 42

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, 06:55
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

Kudos [?]: 379 [0], given: 42

Re: If r = (x+y)/2 and s = (x-y)/2, what is the value of r + s?   [#permalink] 11 Nov 2017, 06:55
Display posts from previous: Sort by