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29 Feb 2012, 10:30
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
56% (01:09) correct
44%
(00:57)
wrong
based on 326
sessions
History
Date
Time
Result
Not Attempted Yet
Alan and Betty live in a multi-story apartment building. How many stories does the building have?
(1) There are 3 stories between those on which Alan and Betty live.
(2) There are 9 stories above Alan's floor and 9 stories below Betty's floor.
(1) There are 3 stories between those on which Alan and Betty live.
(2) There are 9 stories above Alan's floor and 9 stories below Betty's floor.
29 Feb 2012, 10:36
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Chembeti
It's straight E. You just should consider two cases: when Alan lives above Betty and vise versa:
--------Betty---Alan---------
-----Alan---Betty-----
Answer: E.
29 Feb 2012, 10:47
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Adding some text to the above
1. 3 between Alan and Betty clearly doesn't give us any detail on the number of stories in the building. Hence Insufficient.
2.
9 story above Alans floor
9 story below Bettys floor. This could be in any order.
Hence Insufficient.
1 and 2 together
Again doesn't give us any detail on the order. i.e. if Betty is 3 floors above or below Alan.
Clearly E.
1. 3 between Alan and Betty clearly doesn't give us any detail on the number of stories in the building. Hence Insufficient.
2.
9 story above Alans floor
9 story below Bettys floor. This could be in any order.
Hence Insufficient.
1 and 2 together
Again doesn't give us any detail on the order. i.e. if Betty is 3 floors above or below Alan.
Clearly E.
