BTGModeratorVI wrote: ↑Thu Jul 23, 2020 6:39 am
Is p + pz = p?
(1) p = 0
(2) z = 0
Answer:
D
Source: GMAT prep
Target question: Is p + pz = p?
This is a great candidate for
rephrasing the target question.
Take
Is p + pz = p? and subtract p from both sides to get:
Is pz = 0?
In order for pz to equal 0, it must be the case that either p = 0 or z = 0 (or they both equal 0)
REPHRASED target question: Does either p or z equal 0?
Statement 1: p = 0
This answers our
REPHRASED target question perfectly.
Since we can answer the
REPHRASED target question with certainty, statement 1 is SUFFICIENT
Statement 2: z = 0
This answers our
REPHRASED target question perfectly.
Since we can answer the
REPHRASED target question with certainty, statement 2 is SUFFICIENT
Answer: D
