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If k is an odd integer, which of the following must be an ev : Multiple-choice Questions — Select One Answer Choice

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Re: If k is an odd integer, which of the following must be an ev [#permalink]
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some properties of odd numbers are odd-odd=even; odd+odd =even; \(odd^2\) is odd; odd*odd = odd; odd-even=odd; odd+odd = even; odd/odd is odd if divisible

from the concept of odd we can eliminate a,b,c,d

alternately, we can try 1 for x
only E will give a even number
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If k is an odd integer, which of the following mus be an even integer? [#permalink]
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If k is an odd integer, which of the following mus be an even integer?

A. k^2-4
B. 3k+2
C. 2k+1
D. 12k/8
E. 6k/3

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Re: If k is an odd integer, which of the following mus be an even integer? [#permalink]
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K= odd
Which ff must be even?
A. (Odd)^2- even = odd
B. (Odd)^2 + even= odd
C. Even(odd) + odd =odd
D Odd/Even = fraction
E. 6(odd)/odd = 6 = even

Answer E

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Re: If k is an odd integer, which of the following must be an ev [#permalink]
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A fast way to solve (without picking numbers) - look at the answer choices and see that 6k/3 = 2k and a number multiplied by 2 is always even.
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Re: If k is an odd integer, which of the following must be an ev [#permalink]
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It's best to just work through them from top to bottom if you have time, but notice that E will result in 2k, and an even multiplied by any integer is even:

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