If x and z are integers, is x + z^2 odd?

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BTGmoderatorDC: Moderator; Posts: 7187; Joined: Thu Sep 07, 2017 4:43 pmFollowed by: 23 members

by BTGmoderatorDC » Sat Dec 28, 2019 4:51 pm

If x and z are integers, is x + z^2 odd?

(1) x is odd and z is even.
(2) x - z is odd.

OA D

Source: Official Guide

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Source: Beat The GMAT — Data Sufficiency | Sat Dec 28, 2019 4:51 pm

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