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

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

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New post 13 Dec 2015, 03:57
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A
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D
E

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Kudos [?]: 135508 [0], given: 12697

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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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New post 13 Dec 2015, 09:57
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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)



Option D is my answer

3a+5b==0dd*odd + odd*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 [#permalink]

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New post 13 Dec 2015, 10:25
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Take any two odd nos say, a=1 and b=3
D is the answer.
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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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New post 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)


Let’s analyze each answer choice:

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.

Answer: D
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Kudos [?]: 981 [0], given: 5

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