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

It is currently 23 Oct 2014, 10:41

Close

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

What is the sum of the integers A and B? 1. A=-/B/ 2.B=-/A

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 03 Nov 2005
Posts: 399
Location: Chicago, IL
Followers: 3

Kudos [?]: 25 [0], given: 17

What is the sum of the integers A and B? 1. A=-/B/ 2.B=-/A [#permalink] New post 21 Jan 2006, 21:52
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
What is the sum of the integers A and B?

1. A=-/B/
2.B=-/A/
_________________

Hard work is the main determinant of success

VP
VP
avatar
Joined: 21 Sep 2003
Posts: 1071
Location: USA
Followers: 3

Kudos [?]: 31 [0], given: 0

 [#permalink] New post 21 Jan 2006, 22:14
Thinking E here.

1) With some examples I found tha A = -|B|
=> A = B or A = -B or A = B = 0
2) Same as 1) B = -A or B =A or A = B = 0.

So in my opinion 1) & 2) are the same. Hence E.
_________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

- Bernard Edmonds

VP
VP
User avatar
Joined: 29 Dec 2005
Posts: 1351
Followers: 7

Kudos [?]: 28 [0], given: 0

Re: DS (Sum of intergers) [#permalink] New post 21 Jan 2006, 22:26
rlevochkin wrote:
What is the sum of the integers A and B?

1. A=-/B/
2.B=-/A/


from i, A=-/B/, suppose b=1
A=-/1/=-1, a+b=1-1=0
suppose b=-1
A=-/-1/=-1, a+b=-1-1=-2
suppose b=0
A=-/0/=0, a+b=0+0=0

from ii, B=-/A/. it is also the same as i.
ok, agree with E.
CEO
CEO
User avatar
Joined: 20 Nov 2005
Posts: 2922
Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
Followers: 15

Kudos [?]: 82 [0], given: 0

 [#permalink] New post 22 Jan 2006, 00:54
D it is

St1: This is possible only when A = 0 and B = 0 So Sum = 0

St2: This is possible only when A = 0 and B = 0 So Sum = 0
_________________

SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

Director
Director
avatar
Joined: 13 Nov 2003
Posts: 801
Location: BULGARIA
Followers: 1

Kudos [?]: 21 [0], given: 0

 [#permalink] New post 22 Jan 2006, 02:27
think it should be C)
stmnt 1) B=5 A=-5 sum is 0
B=-5 A=-5 sum is -10


Stmnt 2) A=5 B=-5 sum is 0
A=-5 B=-5 sum is -10


combining both gives A=-5 B=-5
Director
Director
avatar
Joined: 17 Dec 2005
Posts: 555
Location: Germany
Followers: 1

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

Re: DS (Sum of intergers) [#permalink] New post 22 Jan 2006, 04:43
Professor wrote:
rlevochkin wrote:
What is the sum of the integers A and B?

1. A=-/B/
2.B=-/A/


from i, A=-/B/, suppose b=1
A=-/1/=-1, a+b=1-1=0
suppose b=-1
A=-/-1/=-1, a+b=-1-1=-2
suppose b=0
A=-/0/=0, a+b=0+0=0

from ii, B=-/A/. it is also the same as i.
ok, agree with E.


Agree with your approach, it's E
Current Student
avatar
Joined: 28 Dec 2004
Posts: 3403
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 164 [0], given: 2

Re: DS (Sum of intergers) [#permalink] New post 22 Jan 2006, 09:33
rlevochkin wrote:
What is the sum of the integers A and B?

1. A=-/B/
2.B=-/A/


OK lets see....

(1) pick number b=1

then a=-1, then a+b=-1+1=0

say b=-1

then a=-1, -1-1=-2..Insuff

(2) same approach as above

together insuff

E it is...
VP
VP
User avatar
Joined: 20 Sep 2005
Posts: 1023
Followers: 3

Kudos [?]: 24 [0], given: 0

 [#permalink] New post 22 Jan 2006, 21:11
Go with E.

1. A = -1, B can be 1,-1. A+B = 0 or -2.
2. Same as above.

Combining, I can't figure out additional info.
Director
Director
User avatar
Joined: 26 Feb 2006
Posts: 907
Followers: 4

Kudos [?]: 44 [0], given: 0

Re: DS (Sum of intergers) [#permalink] New post 05 Jun 2007, 16:17
rlevochkin wrote:
What is the sum of the integers A and B?

1. A=-/B/
2.B=-/A/


if A = -B, and B = - A, then A +B = 0.

but

A = - /B/ is not the same as A = -B. similarly B = -/A/ is also different from B = -A.

So E, not D, should be the answer.
Senior Manager
Senior Manager
User avatar
Joined: 04 Mar 2007
Posts: 447
Followers: 1

Kudos [?]: 13 [0], given: 0

 [#permalink] New post 06 Jun 2007, 22:35
My answer is E
(1)
1) a=-b ---> a+b = 0
2) a=b ----> a+b =2b
(2)
1) b=a ----> a+b=2a
2) b=-a ---> a+b=0

What is OA?
Manager
Manager
avatar
Joined: 14 Mar 2007
Posts: 96
Followers: 1

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

 [#permalink] New post 06 Jun 2007, 23:07
I'm getting E too.

S1. A = -|B|
B=1
A= -1
A+B=0
B=-1
A=-1
A+B=-2

S2. B= -|A|
Alone, we have the same reasons as above

S1&S2.
From S1 we have if B=-1, A=-1
Put A=-1 in S2 we get B=-1

Both the equations are satisfied here. But this applies to all negative numbers.

So A+B = Unknown
Manager
Manager
avatar
Joined: 17 Oct 2006
Posts: 52
Followers: 0

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

 [#permalink] New post 06 Jun 2007, 23:17
From 1) A=-/B/ which means that a) A=B or b)A = -B
from a) A-B=0, from b) A+B=0, adding both equations, 2A=0 so A=0, subtracting both equations gives B=0 so A+B=0. So sufficeint. Similarly statement 2 is also sufficient. So it has to be D. Only 0 suffices the conditions.
Intern
Intern
avatar
Joined: 04 Feb 2007
Posts: 40
Followers: 1

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

 [#permalink] New post 07 Jun 2007, 10:48
(E)

(1) --------INSUFFF

&

(2) --------INSUFFF

TOGETHER (1) + (2) =>

A+B = -{ l A l + l B l } gives diff. values. for diff values of A & B.INSUFF.
  [#permalink] 07 Jun 2007, 10:48
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Are a and b integers? (1) a/b is an integer eybrj2 1 24 Feb 2012, 22:25
If a,b and c are integers, what is the value of a? 1) Vavali 4 15 Jun 2008, 11:27
If a,b, and c are integers, what is the value of a? 1 gnr646 3 02 Sep 2007, 09:51
2 Experts publish their posts in the topic What is the sum of integers A and B? (1) |A| = -|B| (2) |B| alimad 10 14 Jun 2007, 11:02
What is the sum of integer A and B? 1. |A| = -|B| 2. |B| = alimad 2 08 Jul 2006, 06:22
Display posts from previous: Sort by

What is the sum of the integers A and B? 1. A=-/B/ 2.B=-/A

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.