It is currently 21 Oct 2017, 23:45

### 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 positive integers and 1 + x + y + xy = 15,

Author Message
Director
Joined: 29 Aug 2005
Posts: 855

Kudos [?]: 489 [0], given: 7

If x and y are positive integers and 1 + x + y + xy = 15, [#permalink]

### Show Tags

23 Nov 2008, 05:59
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If x and y are positive integers and 1 + x + y + xy = 15, what is the value of x + y?
A. 3
B. 5
C. 6
D. 8
E. 9

Kudos [?]: 489 [0], given: 7

Intern
Joined: 21 Nov 2008
Posts: 4

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

Re: GMAT Set 27 - 3 [#permalink]

### Show Tags

23 Nov 2008, 07:04
C: 6
2 & 4 for x & y will suffice

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

Director
Joined: 29 Aug 2005
Posts: 855

Kudos [?]: 489 [0], given: 7

Re: GMAT Set 27 - 3 [#permalink]

### Show Tags

23 Nov 2008, 08:34
sapnaprakash wrote:
C: 6
2 & 4 for x & y will suffice

Yes, OA C. But Is there more constructive way of solving it?

Kudos [?]: 489 [0], given: 7

Manager
Joined: 05 Jul 2008
Posts: 136

Kudos [?]: 123 [0], given: 40

GMAT 2: 740 Q51 V38
Re: GMAT Set 27 - 3 [#permalink]

### Show Tags

23 Nov 2008, 09:48
botirvoy wrote:
If x and y are positive integers and 1 + x + y + xy = 15, what is the value of x + y?
A. 3
B. 5
C. 6
D. 8
E. 9

(x+1)(y+1)=15
while x+1 and y+1 are integers so
x+1=3
y+1=5

Kudos [?]: 123 [0], given: 40

Director
Joined: 29 Aug 2005
Posts: 855

Kudos [?]: 489 [0], given: 7

Re: GMAT Set 27 - 3 [#permalink]

### Show Tags

30 Nov 2008, 11:36

Kudos [?]: 489 [0], given: 7

Re: GMAT Set 27 - 3   [#permalink] 30 Nov 2008, 11:36
Display posts from previous: Sort by