Track / Stage 1 / 23 of 320 #23 of 2604

If $a$ is an even integer and $b$ is an odd integer, which of the following could represent an odd integer?

(A) $ab$ (B) $a + 2b$ (C) $2a - 2b$ (D) $a + b + 1$ (E) $a - b$

The source for this one didn't record the answer, so there is nothing to check what you type against. Work it on paper and mark yourself against the solution below.

I solved it I didn't Skip

Next problem →

We don't reproduce this publisher's solutions. Their own solution is here — work the problem first.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty, ordering) added by this project. Solutions are the publisher's, linked not copied.