BTGModeratorVI wrote: ↑Sat Aug 08, 2020 7:03 am
Is rw = 0?
(1) −6 < r < 5
(2) 6 < w < 10
Answer:
E
Source: Official guide
Solution:
Question Stem Analysis:
We need to determine whether rw is 0.
Statement One Alone:
Since we don’t know anything about the value of w, we can’t determine whether rw is 0. Statement one alone is not sufficient.
Statement Two Alone:
Since we don’t know anything about the value of r, we can’t determine whether rw is 0. Statement two alone is not sufficient.
Statements One and Two Together:
With the two statements, we still don’t have enough information to determine whether rw is 0. For example, if r = 0 and w = 7, then rw = 0. However, if r = 1 and w = 7, then rw ≠ 0. Both statements together are still not sufficient.
Answer: E
