Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 03 Aug 2015, 07:40

### 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 X and Y are prime integers, what is X+Y? 1. X-Y is a

Author Message
TAGS:
Intern
Joined: 03 Mar 2010
Posts: 40
Followers: 1

Kudos [?]: 12 [1] , given: 1

If X and Y are prime integers, what is X+Y? 1. X-Y is a [#permalink]  29 Jul 2010, 12:35
1
KUDOS
00:00

Difficulty:

25% (medium)

Question Stats:

63% (01:58) correct 38% (00:40) wrong based on 48 sessions
If X and Y are prime integers, what is X+Y?
1. X-Y is a prime integer
2. Y<X<6
[Reveal] Spoiler: OA

_________________

Hardworkingly, you like my post, so kudos me.

Retired Moderator
Status: The last round
Joined: 18 Jun 2009
Posts: 1316
Concentration: Strategy, General Management
GMAT 1: 680 Q48 V34
Followers: 65

Kudos [?]: 646 [2] , given: 157

Re: Prime integers [#permalink]  29 Jul 2010, 12:44
2
KUDOS
Stmt 1.
$$X-Y=Prime number$$ :: $$5-3=2$$ & $$7-5=2$$ Both equations cover stmt 1, hence stmt 1 is insufficient.

Stmt 2.
$$Y<X<6$$ :: $$2<5<6$$ & $$2<3<6$$ both inequalities cover stmt 2, hence stmt 2 is also insufficient.

Combining both statments
$$X & Y$$ can be $$2 & 5$$ or $$3 & 5$$. Hence insufficient. Answer is "E".
Hope it helps.
_________________
Manager
Joined: 02 Apr 2010
Posts: 98
Followers: 1

Kudos [?]: 8 [0], given: 1

Re: Prime integers [#permalink]  01 Aug 2010, 08:29
yeah. this is easy! =)
Manager
Joined: 14 Jul 2010
Posts: 72
Followers: 2

Kudos [?]: 14 [0], given: 2

Re: Prime integers [#permalink]  01 Aug 2010, 21:58
I used to hate prime number questions. But I feel much comfortable with them since I write down 2,3,5,7 immediately after I see such a questions.
Intern
Joined: 15 Jul 2010
Posts: 1
Followers: 0

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

Re: Prime integers [#permalink]  05 Aug 2010, 13:14
3-2=1, which is not prime, whereas 5-3=2, which is prime. Therefore, the answer must be x=5 and y=2 (5+2=7). The answer should be C, both together are sufficient to answer the question!
Manager
Joined: 03 Jun 2010
Posts: 183
Location: United States (MI)
Concentration: Marketing, General Management
Followers: 4

Kudos [?]: 32 [0], given: 40

Re: Prime integers [#permalink]  06 Aug 2010, 01:26
crazyum88 wrote:
3-2=1, which is not prime, whereas 5-3=2, which is prime. Therefore, the answer must be x=5 and y=2 (5+2=7). The answer should be C, both together are sufficient to answer the question!

from (1)+(2) we have
x=5, y=3
x=5, y=2
"1" is not a prime, so x=3, y=2 doesn't fit.
2 possible options. Looks like (E)
Re: Prime integers   [#permalink] 06 Aug 2010, 01:26
Similar topics Replies Last post
Similar
Topics:
6 If x and y are integers and xy ≠ 0, what is the value of x/y ? 8 24 Mar 2015, 03:37
2 If x is a positive integer and x^y=1, what is the value of x? 3 29 Dec 2014, 03:59
4 If x·y≠0, what is the value of x/y? (1) −|x|=y (2) −|y|=x 4 01 Feb 2014, 14:05
1 If x and y are integers, what is the value of x+y? 3 12 Apr 2011, 05:16
4 If x and y are prime numbers, what is the value of |x-y|? 11 15 Mar 2011, 15:36
Display posts from previous: Sort by