Building
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Source: Beat The GMAT — Data Sufficiency |
IMO E
try n solve it with number line
A
---------A-----3--------S--------
cant tell before A and after S
so insuff
B
above A 9 and below B 9
here we dont know the difference so Insuff
A+B
it looks C is the answer but there is a catch
we dont know A/S who lives on higher floor
consider two drms
----6----A-----3--------S---6----
----9----S-----3--------A---9----
hence Insuff
Hope this helps
try n solve it with number line
A
---------A-----3--------S--------
cant tell before A and after S
so insuff
B
above A 9 and below B 9
here we dont know the difference so Insuff
A+B
it looks C is the answer but there is a catch
we dont know A/S who lives on higher floor
consider two drms
----6----A-----3--------S---6----
----9----S-----3--------A---9----
hence Insuff
Hope this helps
-
logitech
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Somebody studied his OG book!stop@800 wrote:IMO E
try n solve it with number line
A
---------A-----3--------S--------
cant tell before A and after S
so insuff
B
above A 9 and below B 9
here we dont know the difference so Insuff
A+B
it looks C is the answer but there is a catch
we dont know A/S who lives on higher floor
consider two drms
----6----A-----3--------S---6----
----9----S-----3--------A---9----
hence Insuff
Hope this helps
LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"
-
cramya
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Stop@800,it looks C is the answer but there is a catch
we dont know A/S who lives on higher floor
consider two drms
----6----A-----3--------S---6----
----9----S-----3--------A---9----
hence Insuff
Hope this helps
The diagram above; will it not contradict the fact that there are 9 stories above Alan's floor and 9 stories below Betty's floor
Should it not be
6---- B(S whatever))----3----A------6 which will be 15
9-----A------3-------B(S whatever)---------9 which will be 21
Hence E)
Hope I am not missing something here; feell free to jump in bud
I am sorry, But I could not find the point of error.cramya wrote:Stop@800,it looks C is the answer but there is a catch
we dont know A/S who lives on higher floor
consider two drms
----6----A-----3--------S---6----
----9----S-----3--------A---9----
hence Insuff
Hope this helps
The diagram above; will it not contradict the fact that there are 9 stories above Alan's floor and 9 stories below Betty's floor
Should it not be
6---- B(S whatever))----3----A------6 which will be 15
9-----A------3-------B(S whatever)---------9 which will be 21
I think we both have drawn similar diagram.
Hence E)
Hope I am not missing something here; feell free to jump in bud
-
cramya
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- Joined: Thu Aug 28, 2008 6:14 pm
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Never mind ; I was trying to saythat your A and S are interchanged ; the diagram is correct as far as the numbers go... Its no big deal since the concept underlying is the same....I am sorry, But I could not find the point of error.
I think we both have drawn similar diagram.
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logitech
- Legendary Member
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Andrew, think this problem as an ABSOLUTE value problem/acorra wrote: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
Many thanks
Andrew
statement 1 means ABS (A-B) = 3
So start thinking about the OPTION E, before you start your solution.
LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"
