If x is an integer and 2x + 3 is odd; which of the following must be true about x?
- A. x can be any integer; since 2x is always even and adding 3 always makes it odd ✓
- B. x must be even
- C. x must be odd
- D. x must be a multiple of 3
Correct answer
A. x can be any integer; since 2x is always even and adding 3 always makes it odd
Explanation
2x is always even regardless of x; since it's 2 times an integer. Adding 3 (odd) to an even number always yields an odd number; so this holds for any integer x.
Submitted by: MCQsHub Editorial
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