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

 It is currently 16 Sep 2014, 13:31

### 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 consecutive odd integers, what is the sum of

Author Message
TAGS:
Manager
Joined: 31 Oct 2007
Posts: 115
Location: Frankfurt, Germany
Followers: 1

Kudos [?]: 22 [0], given: 0

If x and y are consecutive odd integers, what is the sum of [#permalink]  22 Mar 2008, 01:01
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
25. If x and y are consecutive odd integers, what is the sum of x and y?
(1) The product of x and y is negative.
(2) One of the integers is equal to –1.
_________________

Jimmy Low, Frankfurt, Germany
Blog: http://mytrainmaster.wordpress.com
GMAT Malaysia: http://gmatmalaysia.blogspot.com

SVP
Joined: 04 May 2006
Posts: 1941
Schools: CBS, Kellogg
Followers: 17

Kudos [?]: 282 [0], given: 1

Re: 1000DS: Section 2 Question 25 [#permalink]  22 Mar 2008, 01:42
jimmylow wrote:
25. If x and y are consecutive odd integers, what is the sum of x and y?
(1) The product of x and y is negative.
(2) One of the integers is equal to –1.

C.
x and y odd
x = y+2 (if x<y)
y=x+2 (if y<x)
we do not know the order, so

1. x*y <0, we know only x and y are different signs. not sufficient
2. give you nothing about the other, the other can bigger or smaller than the one given

1 and 2 combine: sufficient
_________________
SVP
Joined: 28 Dec 2005
Posts: 1593
Followers: 2

Kudos [?]: 73 [0], given: 2

Re: 1000DS: Section 2 Question 25 [#permalink]  22 Mar 2008, 05:44
wouldnt this be A ?

If we know that the product is negative, and the numbers are consecutive, only -1 and 1 works.

regardless of which one is x and which is y, the sum is always the same.
Manager
Joined: 31 Oct 2007
Posts: 115
Location: Frankfurt, Germany
Followers: 1

Kudos [?]: 22 [0], given: 0

Re: 1000DS: Section 2 Question 25 [#permalink]  22 Mar 2008, 06:52
Ans is A. I am interested to know the logic/principle behind each statement.
_________________

Jimmy Low, Frankfurt, Germany
Blog: http://mytrainmaster.wordpress.com
GMAT Malaysia: http://gmatmalaysia.blogspot.com

Re: 1000DS: Section 2 Question 25   [#permalink] 22 Mar 2008, 06:52
Similar topics Replies Last post
Similar
Topics:
X is the sum of Y Consecutive Integers... 0 14 Aug 2013, 13:05
If x and y are consecutive odd integers, what is the sum of 2 15 Dec 2009, 08:33
If x and y are consecutive odd integers, what is the sum of 5 10 Jul 2009, 12:04
1 If x, y, and z are consecutive odd integers such that 31 2 24 Aug 2008, 12:50
The Sum of first N consecutive odd integers is N^2. What is 9 02 Aug 2006, 16:34
Display posts from previous: Sort by