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Consider first statement (1) alone. It says 5x^2 > 3x^3. Or 5x^2 – 3x^3 > 0. Or x^2(5 – 3x) > 0. Now x^2 is always positive. So 5-3x > 0. This means 3x < 5. Or 6x < 10. Or 10 – 6x > 0. So (1) alone is sufficient to answer the question. Next consider (2) alone. It says 4 > 3/x. Now we cannot d...
- by alivapriyada
Thu Sep 30, 2010 3:31 am- Forum: Data Sufficiency
- Topic: Decent algebra-based DS problem
- Replies: 6
- Views: 1502
What is the volume, in cubic feet, of a rectangular room that has length x feet, width y feet, and height z feet? 1) x=1200/yz 2) The area of the ceiling of this room is 120 square feet and the area of each of two facing walls of this room is 100 square ft. [spoiler] OA: A [/spoiler] This might be ...
- by alivapriyada
Thu Sep 30, 2010 3:26 am- Forum: Data Sufficiency
- Topic: Volume of a rectangular room
- Replies: 8
- Views: 3697
ankur yes i understand what you mean say. with the same logic i came to a conclusion that answer is B but my question was that, if another question says that x/y is not even integer in that case should we consider x/y as decimal as well??? I know its a bit silly thing but i need to be sure. Ishaan ...
- by alivapriyada
Thu Sep 30, 2010 3:10 am- Forum: Data Sufficiency
- Topic: What does NOT even integer mean exactly???
- Replies: 5
- Views: 1533
Perhaps I'm nitpicking, but I think this question is a little unclear. Just because 100 of the red sweaters are NOT wool doesn't mean that the remaining 50 ARE wool. They could be cotton or polyester, or whatever. If it were the other way around it and the question was "how many of the red swe...
- by alivapriyada
Thu Sep 30, 2010 3:02 am- Forum: Data Sufficiency
- Topic: Wording?
- Replies: 13
- Views: 7786
Average weight of the class = (Total weight of boys + Total weight of girls) / (Total number of boys + Total number of girls) Since we cannot calculate the total weight, E has to be the answer.......hehehe ;) What is the average weight of the class? A. The ratio of the average weight of all the boy...
- by alivapriyada
Thu Sep 30, 2010 2:57 am- Forum: Data Sufficiency
- Topic: average weight
- Replies: 10
- Views: 1740
In GMAT, we only consider the positive square root. So if n = sqrt(4), the value of n is only 2 and not -2. However had it been given that n^2 = 4, then we would have to take that n has two values 2 and -2. Hence statement (1) is sufficient in this case. Thanks for the clarification, then in the ca...
- by alivapriyada
Thu Sep 30, 2010 2:36 am- Forum: Data Sufficiency
- Topic: Data Sufficiency and Square Roots
- Replies: 4
- Views: 1272
- by alivapriyada
Thu Sep 30, 2010 2:31 am- Forum: Sentence Correction
- Topic: Having reached!
- Replies: 8
- Views: 1611
What is the average weight of the class? A. The ratio of the average weight of all the boys and girls is 3:2 B. The number of boys and girls in the class are 40 and 60 respectively [spoiler]OA later [/spoiler] Statement 1 is insufficient, so we are left with B,C,E Statement 2 is insufficient, so we...
- by alivapriyada
Thu Sep 30, 2010 2:23 am- Forum: Data Sufficiency
- Topic: average weight
- Replies: 10
- Views: 1740
- by alivapriyada
Wed Sep 29, 2010 11:53 pm- Forum: Sentence Correction
- Topic: All each challenge
- Replies: 9
- Views: 1727
M STUCK BETWEEN D & E
whether to use 'has been' or 'is'.
Because all can be singular as well as plural,depending on the situation.
so plz reveal OA.
- by alivapriyada
Wed Sep 29, 2010 11:29 pm- Forum: Sentence Correction
- Topic: All each challenge
- Replies: 9
- Views: 1727
Divisibility
N and R are integers. If N is divisible by 10^R, but cannot be divisible by 10^(R+1), R=?
1). N is divisible by 2^5, but cannot be divisible by 2^6.
2). N is divisible by 5^6, but cannot be divisible by 5^7.
[spoiler]OA not known, plz explain!!![/spoiler]
- by alivapriyada
Wed Sep 29, 2010 11:07 pm- Forum: Data Sufficiency
- Topic: Divisibility
- Replies: 4
- Views: 1374
average weight
What is the average weight of the class?
A. The ratio of the average weight of all the boys and girls is 3:2
B. The number of boys and girls in the class are 40 and 60 respectively
[spoiler]OA later
[/spoiler]
- by alivapriyada
Wed Sep 29, 2010 11:03 pm- Forum: Data Sufficiency
- Topic: average weight
- Replies: 10
- Views: 1740
- by alivapriyada
Wed Sep 29, 2010 10:20 am- Forum: Critical Reasoning
- Topic: Critical Reasoning
- Replies: 8
- Views: 1839
- by alivapriyada
Wed Sep 29, 2010 10:06 am- Forum: Critical Reasoning
- Topic: Critical Reasoning
- Replies: 12
- Views: 2367
- by alivapriyada
Wed Sep 29, 2010 9:52 am- Forum: Critical Reasoning
- Topic: Assumption CR
- Replies: 6
- Views: 1529