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If j and k are integers and j — k is even, which of the foll

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If j and k are integers and j — k is even, which of the foll [#permalink] New post 03 Feb 2017, 02:50
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Question Stats:

58% (00:57) correct 41% (00:47) wrong based on 41 sessions


If \(j\) and k are integers and \(j — k\) is even, which of the following must be even?

A) \(k\)

B) \(jk\)

C) \(j + 2k\)

D) \(jk + j\)

E) \(jk — 2j\)
[Reveal] Spoiler: OA

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Re: If j and k are integers and j — k is even, which of the foll [#permalink] New post 15 Feb 2017, 20:06
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Explanation

Now the thing to remember here is that

even number - even number = even number or odd number - odd number = even number.

Assume a pair of values j = 4 k = 2 and j =3 and k= 1






Optionsj = 4 and k = 2j =3 and k= 1
k21
jk83
j + 2k85
jk + j106
jk — 2j01


Hence only option D fits.
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Re: If j and k are integers and j — k is even, which of the foll   [#permalink] 15 Feb 2017, 20:06
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