ABC26GN0083 · Number System

Subject: General Aptitude · Chapter: Number System · Exam: · Marks: · Difficulty:

If $x$ is an odd integer, then which of the following is true?

(a)$5 x-2$ is even

(b)$5 x^{2}+2$ is odd

(c)$5 x^{2}+3$ is odd

(d)None of these

Answer

Answer (as printed):

Explanation

$x$ is odd $\Rightarrow x^{2}$ is odd $\Rightarrow 5 x^{2}$ is odd $\Rightarrow\left(5 x^{2}+2\right)$ is odd.

Explanation as extracted from the printed page; notation may be imperfect.