MrEasy
Guys I have a question, in the GMAT prep I came across this question (See attachment).
I wonder, does it not make a difference when someone assumes that n could be 0 as it is not explicitly stated in the question that it is not?
If # denotes one of the four arithmetic operations addition, subtraction, multiplication and division, what is the value of 1 # 2?
(1) n # 0 = n
for all integers n (2) n # n = 0
for all integers n The key here is the bold part of the statement, which tells us that statements MUST be
true for all integers. I guess your concern is about the statement (2):
n # n = 0 --> means # can denote only subtraction to be true for ALL integers. Though if n=0 it can denote addition and multiplication as well but one value of n can not determine #.
So the answer is B.
Hope it's clear.
why the option D is not the answer. please explain. I think in stmt 1 the operation can be addition?