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DHRJ007: Senior | Next Rank: 100 Posts; Posts: 31; Joined: Thu Sep 17, 2020 9:27 amFollowed by: 1 member

by DHRJ007 » Mon Sep 21, 2020 9:28 am

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If w, y, and z are positive integers, and w = y – z, is w a perfect square?
(1) y + z is a perfect square.
(2) z is even.

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Source: Beat The GMAT — Data Sufficiency | Mon Sep 21, 2020 9:28 am

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