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manasgoswami1
- Senior | Next Rank: 100 Posts
- Posts: 31
- Joined: Thu Jul 01, 2010 5:54 am
Is a^3 > 20?
(1) a^4 > 80
(2) a^5 > 200
answer
B.
Here's another question that is looking for a yes or no answer. Statement (1) allows for both
positive and negative values of a, so it is not sufficient, and we can cross off A and D.
Statement (2), on the other hand, tells us that a is positive and must be a value of at least 3.
If a > 3, then the answer to the question stem must always be yes. Therefore, statement (2) is suffi-
cient, and our answer is B.
My question is on statement 2
how can we assume that the value at least 3? it could be a fraction too like 2.9
(1) a^4 > 80
(2) a^5 > 200
answer
B.
Here's another question that is looking for a yes or no answer. Statement (1) allows for both
positive and negative values of a, so it is not sufficient, and we can cross off A and D.
Statement (2), on the other hand, tells us that a is positive and must be a value of at least 3.
If a > 3, then the answer to the question stem must always be yes. Therefore, statement (2) is suffi-
cient, and our answer is B.
My question is on statement 2
how can we assume that the value at least 3? it could be a fraction too like 2.9
