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Before play-offs, a certain team had won 80 percent of its

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Manager
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Before play-offs, a certain team had won 80 percent of its [#permalink] New post 05 Nov 2003, 17:10
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A
B
C
D
E

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Before play-offs, a certain team had won 80 percent of its games. After play-offs, what percent of all its games had the team won?
(1) The team competed in 4 play-off games.
(2) The team won all of its play-off games.


Is quadrilateral RSTV a rectangle?
(1) The measure of ∠RST is 90
(2) The measure of ∠TVR is 90


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 [#permalink] New post 05 Nov 2003, 23:47
Answere E in both the cases ??

1) Each statement by itself doesnt seem enough. We need to know the number of games a team played before the playoffs.

2) Again each statement doesnt seem enough. We only know that the sum of the other two angles is 180 degrees. These angles could be anything.
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 [#permalink] New post 06 Nov 2003, 15:48
well i do feel tha teh answer tpo the second one might just be C, if u draw the quad geometrically there is no way that the quad will be anything other than a rectangle........

i would go for
1:E
2:c
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 [#permalink] New post 07 Nov 2003, 06:23
On the second question, picture a quadrilateral whose angles are 90, 45, 90, and 135.

I can draw it...
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 [#permalink] New post 14 Jan 2004, 19:06
The opposite angles are 90 degrees. The other two angles have to be 90 and 90. However the quadrilateral could be square or a rectangle. Hence the answer is E.
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 [#permalink] New post 14 Jan 2004, 20:28
anand,

Consider this quadrilateral with opposite sides set at 90 degrees, while neither remaining angle is at 90.
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 [#permalink] New post 14 Jan 2004, 20:30
Damn! stoolfi.

What a diagram. I completely missed it.

Great job.
  [#permalink] 14 Jan 2004, 20:30
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