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If p and q are integers and 20p + 3q is odd, which of the f

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If p and q are integers and 20p + 3q is odd, which of the f [#permalink] New post 20 Sep 2017, 02:12
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If p and q are integers and 20p + 3q is odd, which of the following must be odd?

(A) p – q

(B) p + 2q

(C) 3p + q

(D) 2p + q^2

(E) 3p + 3q
[Reveal] Spoiler: OA

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Re: If p and q are integers and 20p + 3q is odd, which of the f [#permalink] New post 17 Nov 2017, 01:55
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check the values for 20p+3Q It is only posiible to get odd if only the q is odd and p is even .Hence using the following condition we can check the following. But here as p is and q are so called integers for checking use the value of q as odd but any integers for p. Then we will get answer.
Re: If p and q are integers and 20p + 3q is odd, which of the f   [#permalink] 17 Nov 2017, 01:55
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If p and q are integers and 20p + 3q is odd, which of the f

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