Join us for MBA Spotlight – The Top 20 MBA Fair      Schedule of Events | Register

 It is currently 05 Jun 2020, 12:26 ### 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

#### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.  # If a, b, c are integers, is a+b+c an odd number? 1) a+b=odd 2) a+c=odd

Author Message
TAGS:

### Hide Tags

Math Revolution GMAT Instructor V
Joined: 16 Aug 2015
Posts: 9032
GMAT 1: 760 Q51 V42
GPA: 3.82
If a, b, c are integers, is a+b+c an odd number? 1) a+b=odd 2) a+c=odd  [#permalink]

### Show Tags 00:00

Difficulty:   45% (medium)

Question Stats: 64% (01:43) correct 36% (01:25) wrong based on 166 sessions

### HideShow timer Statistics

If a, b, c are integers, is a+b+c an odd number?

1) a+b=odd
2) a+c=odd

_________________
Manager  B
Joined: 28 Jun 2016
Posts: 199
Concentration: Operations, Entrepreneurship
Re: If a, b, c are integers, is a+b+c an odd number? 1) a+b=odd 2) a+c=odd  [#permalink]

### Show Tags

MathRevolution wrote:
If a, b, c are integers, is a+b+c an odd number?

1) a+b=odd
2) a+c=odd

Statement 1:

Insufficient

Statement 2:

Insufficient

Statement 1&2:

If a is even,

Then a+b+c=even No

If a is odd,

Then a+b+c=odd Yes

Insufficient

E

Sent from my iPhone using GMAT Club Forum mobile app
GMAT Club Legend  V
Joined: 11 Sep 2015
Posts: 4889
GMAT 1: 770 Q49 V46
If a, b, c are integers, is a+b+c an odd number? 1) a+b=odd 2) a+c=odd  [#permalink]

### Show Tags

1
Top Contributor
MathRevolution wrote:
If a, b, c are integers, is a+b+c an odd number?

1) a+b=odd
2) a+c=odd

Target question: Is a+b+c an odd number?

Statement 1: a+b=odd
Statement 1 is NOT SUFFICIENT

Statement 2: a+c=odd
Statement 2 is NOT SUFFICIENT

Statements 1 and 2 combined
There are several values of x and y that satisfy BOTH statements. Here are two:
Case a: a = 1, b = 2 and c = 2. In this case, a+b+c = 1+2+2 = 5, and 5 is ODD
Case b: a = 2, b = 1 and c = 1. In this case, a+b+c = 2+1+1 = 4, and 4 is EVEN
Since we cannot answer the target question with certainty, the combined statements are NOT SUFFICIENT

_________________

Originally posted by BrentGMATPrepNow on 01 Nov 2016, 09:58.
Last edited by BrentGMATPrepNow on 02 May 2020, 09:20, edited 1 time in total.
Math Revolution GMAT Instructor V
Joined: 16 Aug 2015
Posts: 9032
GMAT 1: 760 Q51 V42
GPA: 3.82
Re: If a, b, c are integers, is a+b+c an odd number? 1) a+b=odd 2) a+c=odd  [#permalink]

### Show Tags

==>In the original condition, there are 3 variables (a,b,c), so E is highly likely to be the answer. Through 1) & 2), if (a,b,c)=(1,2,2), it is yes, but if (a,b,c)=(2,1,1), it is no, hence not sufficient. The answer is E.

_________________
Non-Human User Joined: 09 Sep 2013
Posts: 15090
Re: If a, b, c are integers, is a+b+c an odd number? 1) a+b=odd 2) a+c=odd  [#permalink]

### Show Tags

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________ Re: If a, b, c are integers, is a+b+c an odd number? 1) a+b=odd 2) a+c=odd   [#permalink] 10 Mar 2020, 22:39

# If a, b, c are integers, is a+b+c an odd number? 1) a+b=odd 2) a+c=odd  