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# If a and b are odd integers, which of the following must be an even in

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Math Expert
Joined: 02 Sep 2009
Posts: 51280
If a and b are odd integers, which of the following must be an even in  [#permalink]

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13 Dec 2015, 03:57
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Difficulty:

5% (low)

Question Stats:

89% (00:59) correct 11% (01:15) wrong based on 116 sessions

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If a and b are odd integers, which of the following must be an even integer?

A. a(b – 2)
B. ab + 4
C. (a + 2)(b – 4)
D. 3a + 5b
E. a(a + 6)

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Re: If a and b are odd integers, which of the following must be an even in  [#permalink]

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13 Dec 2015, 09:57
1
Bunuel wrote:
If a and b are odd integers, which of the following must be an even integer?

A. a(b – 2)
B. ab + 4
C. (a + 2)(b – 4)
D. 3a + 5b
E. a(a + 6)

3a+5b==0dd*odd + odd*odd =odd+odd = even.
Current Student
Joined: 18 Sep 2014
Posts: 228
Re: If a and b are odd integers, which of the following must be an even in  [#permalink]

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13 Dec 2015, 10:25
1
Take any two odd nos say, a=1 and b=3
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Posts: 2830
Re: If a and b are odd integers, which of the following must be an even in  [#permalink]

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16 Oct 2017, 16:17
Bunuel wrote:
If a and b are odd integers, which of the following must be an even integer?

A. a(b – 2)
B. ab + 4
C. (a + 2)(b – 4)
D. 3a + 5b
E. a(a + 6)

A) We have odd x odd = odd.

B) We have odd + 4 = odd.

C) We have odd x odd = odd.

D) We have 3(odd) + 5(odd) = odd + odd = even.

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Re: If a and b are odd integers, which of the following must be an even in &nbs [#permalink] 16 Oct 2017, 16:17
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# If a and b are odd integers, which of the following must be an even in

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