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

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Manager
Joined: 22 Apr 2003
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Before play-offs, a certain team had won 80 percent of its [#permalink]

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05 Nov 2003, 18:10
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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

Those question come from GMAT Plus

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Intern
Joined: 10 Oct 2003
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Location: Finland

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06 Nov 2003, 00:47
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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Intern
Joined: 16 Sep 2003
Posts: 21

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Location: Buffalo (NY)

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06 Nov 2003, 16:48
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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Director
Joined: 28 Oct 2003
Posts: 501

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07 Nov 2003, 07:23
On the second question, picture a quadrilateral whose angles are 90, 45, 90, and 135.

I can draw it...

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SVP
Joined: 30 Oct 2003
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14 Jan 2004, 20:06
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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Director
Joined: 28 Oct 2003
Posts: 501

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14 Jan 2004, 21:28
anand,

Consider this quadrilateral with opposite sides set at 90 degrees, while neither remaining angle is at 90.
Attachments

mykite.gif [ 1.87 KiB | Viewed 1054 times ]

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SVP
Joined: 30 Oct 2003
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Location: NewJersey USA

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14 Jan 2004, 21:30
Damn! stoolfi.

What a diagram. I completely missed it.

Great job.

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14 Jan 2004, 21:30
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