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If x is an odd integer, which of the following must be an odd integer?

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Joined: 02 Sep 2009
Posts: 55150
If x is an odd integer, which of the following must be an odd integer?  [#permalink]

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New post 26 Nov 2018, 23:31
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

83% (01:03) correct 17% (00:54) wrong based on 39 sessions

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Joined: 18 Aug 2017
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Location: India
Concentration: Sustainability, Marketing
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WE: Marketing (Energy and Utilities)
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Re: If x is an odd integer, which of the following must be an odd integer?  [#permalink]

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New post 27 Nov 2018, 08:23
Bunuel wrote:
If x is an odd integer, which of the following must be an odd integer?

A. x^4 + 1
B. x^4 − 1
C. (x+1)^5 − 2
D. (x+1)^5 + 1
E. (x+1)^6 + 2



Plug in x= 1 only option D suffices ..
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Re: If x is an odd integer, which of the following must be an odd integer?  [#permalink]

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New post 27 Nov 2018, 09:45
take x=1 and plug in values.
D is the only value which suffices the situation

But since X is an integer, check for X=-1 as well!
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Re: If x is an odd integer, which of the following must be an odd integer?   [#permalink] 27 Nov 2018, 09:45
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If x is an odd integer, which of the following must be an odd integer?

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