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Math Expert V
Joined: 02 Sep 2009
Posts: 58402
Is x + 1 odd? (1) 2x + 5 is odd. (2) x + 6 is odd.  [#permalink]

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Difficulty:   15% (low)

Question Stats: 88% (00:48) correct 12% (01:29) wrong based on 40 sessions

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Is x + 1 odd?

(1) 2x + 5 is odd.
(2) x + 6 is odd.

_________________
VP  D
Joined: 31 Oct 2013
Posts: 1464
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: Is x + 1 odd? (1) 2x + 5 is odd. (2) x + 6 is odd.  [#permalink]

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Bunuel wrote:
Is x + 1 odd?

(1) 2x + 5 is odd.
(2) x + 6 is odd.

Statement 1:

2x + 5 = odd

2x = odd - 5

2x = odd - odd

2x = even

x = even / odd.

NOT sufficient.

Statement 2:

x + 6 = odd

x = odd - 6.

x = odd - even.

x = odd.

Target question :

x + 1

odd + odd = even.

So, x + 1 is not an odd integer.

Sufficient .

B is the best answer.
GMAT Club Legend  D
Joined: 18 Aug 2017
Posts: 5014
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: Is x + 1 odd? (1) 2x + 5 is odd. (2) x + 6 is odd.  [#permalink]

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Bunuel wrote:
Is x + 1 odd?

(1) 2x + 5 is odd.
(2) x + 6 is odd.

#1
x=1,2,3,
in sufficient
#2
x has to be odd
so x+1 is not odd
IMO B Re: Is x + 1 odd? (1) 2x + 5 is odd. (2) x + 6 is odd.   [#permalink] 05 Mar 2019, 11:45
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Is x + 1 odd? (1) 2x + 5 is odd. (2) x + 6 is odd.

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