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If r is represented by the decimal 0.t5 what is the digit ?

1) r< 1/3 2) r < 1/10 Original Answer is B, cause its only satisfied for 0.09 - 0.01 -> therefore t=0 I thought, that it is also possible, that r is negative, because its not stated in the question. so possible solution would be -0,95, -0.85...and therefore its NOT sufficient -> E Or is this a defin...

by peterpong

Tue May 07, 2013 8:18 pm
Forum: Data Sufficiency
Topic: If r is represented by the decimal 0.t5 what is the digit ?
Replies: 2
Views: 1252

Rectangle or quadrilateral

I'm not a native speaker, so I'm not sure if there is a difference in the meaning of these two words. In german a rectangle has four right angles, and is a special form of a quadrilateral. Is it like this in american englisch ? Or is it possible that a rectangle is a parallelogramm or even a geometr...

by peterpong

Mon Jan 28, 2013 3:20 am
Forum: Problem Solving
Topic: Rectangle or quadrilateral
Replies: 2
Views: 718

but we do know, that it is an isosceles triangle. and if the two sides are equal it can only be a 1:1:sqr(2), right ? Or is this rule only sufficient with a right angle ?

by peterpong

Thu Jan 24, 2013 4:49 pm
Forum: Problem Solving
Topic: Perimeter of a rectangle
Replies: 16
Views: 4182

I am asking, because I am trying to learn all the idioms in the GMAT question. I know there are other mistakes, but perhaps there could be a question in the GMAT that test exactly this idiom. If I knew "so weak as" is wrong, like I assumed, I could cross that answer out.

by peterpong

Thu Jan 24, 2013 2:38 am
Forum: Sentence Correction
Topic: Surge & drop
Replies: 16
Views: 8216

Is there any idiom like 'as weak as' ? Or is 'so weak as' also correct ?

by peterpong

Wed Jan 23, 2013 3:38 am
Forum: Sentence Correction
Topic: Surge & drop
Replies: 16
Views: 8216

but I don't understand why statement B isn't the right choice. If we assume, that the author did NOT write a accurate report about Prince Sviatov, then the events desribed in the text must not occur in 1165.

by peterpong

Wed Jan 23, 2013 3:17 am
Forum: Critical Reasoning
Topic: Sviatovin (OG13 49)
Replies: 11
Views: 5107

I am also confused with this question. In statement a) it is said, that both diagonals are equal. I looked into my mathbook and there is written: if it is a rectangle and both diagonals are equal, they bisect each other. With this knowledge we know two sides of the triangle and can solve with pythar...

by peterpong

Tue Jan 22, 2013 4:11 pm
Forum: Problem Solving
Topic: Perimeter of a rectangle
Replies: 16
Views: 4182