Hi Experts,
I eliminated the second statement due to the following reason:
The second-to-last term is 3^10. So, the last one should be 3^11.
But the catch is that, the target question does not provide any information about the elements of the sequence being -ve, +ve, integer of fraction. So, we fail to determine the very first term of the sequence. Consequently we cannot decide the fourth term as well. INSUFFICIENT
The reason provided by Manhattan:
(2) INSUFFICIENT: We can use this information to find the last term and previous terms, however, we don't know how many terms there are between the second-to-last term and the fourth term.
I have hard time grasping the concept, especially the underlined portion. Could you please tell me if there is anything wrong in my reasoning? Also, what exactly does manhattan reasoning mean?
MGMAT CAT1
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- tanvis1120
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Hi tanvis1120,
Your explanation and the one offered by Manhattan are essentially the same: you don't know the exact value of the fourth term because you don't know how the second-to-last term relates to the 4th term.
Using the information from the prompt and the information in Fact 2, we could have a variety of situations. For example:
5th term: 3^10
6th term: 3^11
4th term: 3^9
The answer to the question is 3^9
6th term: 3^10
7th term: 3^11
5th term: 3^9
4th term: 3^8
The answer to the question is 3^8
So Fact 2 is INSUFFICIENT
GMAT assassins aren't born, they're made,
Rich
Your explanation and the one offered by Manhattan are essentially the same: you don't know the exact value of the fourth term because you don't know how the second-to-last term relates to the 4th term.
Using the information from the prompt and the information in Fact 2, we could have a variety of situations. For example:
5th term: 3^10
6th term: 3^11
4th term: 3^9
The answer to the question is 3^9
6th term: 3^10
7th term: 3^11
5th term: 3^9
4th term: 3^8
The answer to the question is 3^8
So Fact 2 is INSUFFICIENT
GMAT assassins aren't born, they're made,
Rich
- tanvis1120
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