GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 29 May 2020, 00:27

### 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

# Is A + B + C = 0? (1) A = -B (2) B = C

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 64222
Is A + B + C = 0? (1) A = -B (2) B = C  [#permalink]

### Show Tags

04 Dec 2018, 02:07
00:00

Difficulty:

25% (medium)

Question Stats:

72% (01:01) correct 28% (00:50) wrong based on 136 sessions

### HideShow timer Statistics

Is A + B + C = 0?

(1) A = -B
(2) B = C

_________________
GMAT Club Legend
Joined: 18 Aug 2017
Posts: 6277
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Is A + B + C = 0? (1) A = -B (2) B = C  [#permalink]

### Show Tags

Updated on: 04 Dec 2018, 02:40
Bunuel wrote:
Is A + B + C = 0?

(1) A = -B
(2) B = C

from1 :
A=-B but no info of C
so -b+b+c=0
c=0 ,
not sufficient

from 2: B=C
A+B+C=0
A+2B=0
combining both wont get us any solution as well
IMO E

Originally posted by Archit3110 on 04 Dec 2018, 02:32.
Last edited by Archit3110 on 04 Dec 2018, 02:40, edited 1 time in total.
examPAL Representative
Joined: 07 Dec 2017
Posts: 1153
Re: Is A + B + C = 0? (1) A = -B (2) B = C  [#permalink]

### Show Tags

04 Dec 2018, 02:35
1) and 2) are obviously insufficient on their own, as each only gives info on two of the three variables.
combining them and representing A and C n terms of B, we get A+B+C = -B+B+B = B. But we don't know if B equals zero or not! insufficient.
_________________
examPAL Representative
Joined: 07 Dec 2017
Posts: 1153
Re: Is A + B + C = 0? (1) A = -B (2) B = C  [#permalink]

### Show Tags

04 Dec 2018, 02:37
Archit3110 wrote:
Bunuel wrote:
Is A + B + C = 0?

(1) A = -B
(2) B = C

from1 :
A=-B but no info of C
so -b+b+c=0
c=0 ,

-b+b+0=o
i think its sufficient

from 2: B=C
A+B+C=0
A+2B=0
not sufficient
IMO A

Archit3110 notice you are solving it as if the equation A + B + C = 0 is a given, but actually - the question is whether this equation is true or not.
_________________
GMAT Club Legend
Joined: 18 Aug 2017
Posts: 6277
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: Is A + B + C = 0? (1) A = -B (2) B = C  [#permalink]

### Show Tags

04 Dec 2018, 02:39
DavidTutorexamPAL wrote:
Archit3110 wrote:
Bunuel wrote:
Is A + B + C = 0?

(1) A = -B
(2) B = C

from1 :
A=-B but no info of C
so -b+b+c=0
c=0 ,

-b+b+0=o
i think its sufficient

from 2: B=C
A+B+C=0
A+2B=0
not sufficient
IMO A

Archit3110 notice you are solving it as if the equation A + B + C = 0 is a given, but actually - the question is whether this equation is true or not.

DavidTutorexamPAL :
yeah understood , where i went wrong.. E would be correct in that case ..
Manager
Joined: 18 Oct 2018
Posts: 91
Location: India
GMAT 1: 710 Q50 V36
GPA: 4
Re: Is A + B + C = 0? (1) A = -B (2) B = C  [#permalink]

### Show Tags

04 Dec 2018, 03:03
This is because
1. A=-B
This will give A+B+C as -B+B+C which equals C.Since value of C is not known,we cannot say whether A+B+C equals 0.
Hence insufficient.

2 B=C, doesn't gives any further information on value of C.Hence insufficient.

Combining 1&2,we still can't find the value of C.
Hence insufficient.

Posted from my mobile device
Director
Joined: 19 Oct 2013
Posts: 504
Location: Kuwait
GPA: 3.2
WE: Engineering (Real Estate)
Re: Is A + B + C = 0? (1) A = -B (2) B = C  [#permalink]

### Show Tags

04 Dec 2018, 03:31
Bunuel wrote:
Is A + B + C = 0?

(1) A = -B
(2) B = C

From statement 1

- B + B + C = 0?

We have C = 0? We don’t know the value of c so it is insufficient.

Statement 2

B = C

A + 2B = 0? We have 2 variables and 1 equation so insufficient.

Combined statement 1 and 2

A = - B

- B + 2B = 0

We have B = 0? Not sufficient.

Posted from my mobile device
Manager
Joined: 17 Jun 2017
Posts: 59
Re: Is A + B + C = 0? (1) A = -B (2) B = C  [#permalink]

### Show Tags

04 Dec 2018, 10:49
Archit3110 wrote:
Bunuel wrote:
Is A + B + C = 0?

(1) A = -B
(2) B = C

from1 :
A=-B but no info of C
so -b+b+c=0
c=0 ,
not sufficient

from 2: B=C
A+B+C=0
A+2B=0
combining both wont get us any solution as well
IMO E

Hi ,
you got the answer correct however , you cannot assume -b+b+c = 0
This question stem was whether a+b+c = 0 ?
We cannot take a+b+c=0 ! This is no where given .
Math Expert
Joined: 02 Sep 2009
Posts: 64222
Re: Is A + B + C = 0? (1) A = -B (2) B = C  [#permalink]

### Show Tags

24 Dec 2018, 00:30
Bunuel wrote:
Is A + B + C = 0?

(1) A = -B
(2) B = C

_________________
Re: Is A + B + C = 0? (1) A = -B (2) B = C   [#permalink] 24 Dec 2018, 00:30