Search found 44 matches
Algebraic equation - machines
hello, I can pick numbers to solve this, but can you show me the proper equation? A company has two types of machines, type R and type S. Operating at a constant rate, a machine of type R does a certain job in 36 hours and a machine of type S does the same job in 18 hours. If the company used the sa...
- by szDave
Thu Jan 24, 2013 6:49 am- Forum: Problem Solving
- Topic: Algebraic equation - machines
- Replies: 4
- Views: 1328
Word Translations - algebraic
Hello, can you give me an explanation. Thanks! Three grades of milk are 1 percent, 2 percent, and 3 percent fat by volume. If x gallons of the 1 percent grade, y gallons of the 2 percent grade, and z gallons of the 3 percent grade are mixed to give x + y + z gallons of a 1.5 percent grade, what is x...
- by szDave
Thu Jan 24, 2013 6:35 am- Forum: Problem Solving
- Topic: Word Translations - algebraic
- Replies: 1
- Views: 827
Probability with balls
Hi all! Each of the 25 balls in a certain box is either red, blue, or white and has a number from 1 to 10 painted on it. If one ball is to be selected at random from the box, what is the probability that the ball selected will either be white or have an even number painted on it? (1) The probability...
- by szDave
Thu Jan 24, 2013 6:30 am- Forum: Data Sufficiency
- Topic: Probability with balls
- Replies: 2
- Views: 1320
Furnished Combinatorics
Hello, To furnish a room in a model home, an interior decorator is to select 2 chairs and 2 tables from a collection of chairs and tables in a warehouse that are all different from each other. If there are 5 chairs in the warehouse and if 150 different combinations are possible, how many tables are ...
- by szDave
Thu Jan 24, 2013 6:26 am- Forum: Problem Solving
- Topic: Furnished Combinatorics
- Replies: 6
- Views: 1906
Wire cut into two pieces
Hello, had trouble with this. Can you give me an explanation for why E is the right answer? A thin piece of wire 40 meters long is cut into two pieces. One piece is used to form a circle with radius r, and the other is used to form a square. No wire is left over. Which of the following represents th...
- by szDave
Thu Jan 24, 2013 6:19 am- Forum: Problem Solving
- Topic: Wire cut into two pieces
- Replies: 2
- Views: 1415
divisibility
If x and y are integers greater than 1, is x a multiple of y? (1) 3y^2 + 7y = x (2) x^2 — x is a multiple of y. a) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. b) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. c) BOTH statements TOGET...
- by szDave
Thu Jan 24, 2013 6:08 am- Forum: Data Sufficiency
- Topic: divisibility
- Replies: 2
- Views: 1065
Remainder
Hi all!
I was just thinking on this problem, and if I pick numbers for 1) e.g.: 8, or 14, the remainder is 2 always - Sufficient, The same applies for 2) e.g.: 17,32 - the remainder is 2. What is not correct in my solution?
- by szDave
Wed Jan 23, 2013 6:49 am- Forum: Data Sufficiency
- Topic: Remainder
- Replies: 1
- Views: 876
Kernland blank assumption
Which of the following, if true, most logically completes the reasoning in the passage? Kerniand’s government restricts the export of unprocessed cashew nuts in order to ensure a low-cost supply for domestic processing plants. Though the policy constrains farm income and limits the number of farme...
- by szDave
Wed Jan 23, 2013 4:07 am- Forum: Critical Reasoning
- Topic: Kernland blank assumption
- Replies: 2
- Views: 4202
Patents - weaken
Hello, I think the correct answer is C , if yes, why or why not? In countries in which new life-sustaining drugs cannot be patented, such drugs are sold at widely affordable prices; those same drugs, where patented, command premium prices because the patents shield patent-holding manufacturers from ...
- by szDave
Wed Jan 23, 2013 3:43 am- Forum: Critical Reasoning
- Topic: Patents - weaken
- Replies: 2
- Views: 864
O2 Boldface
Hello everyone! Had trouble with this one :S I guessed a), but was not correct. Which one, and why is that answer correct? One of the limiting factors in human physical performance Is the amount of oxygen that is absorbed by the muscles from the bloodstream. Accordingly, entrepreneurs have begun sel...
- by szDave
Wed Jan 23, 2013 3:17 am- Forum: Critical Reasoning
- Topic: O2 Boldface
- Replies: 2
- Views: 1035
- by szDave
Wed Jan 23, 2013 3:06 am- Forum: Problem Solving
- Topic: Coordinate Plane - triangle
- Replies: 9
- Views: 6435
Proportionality
Hello, I would like to ask you for an answer and explanation, thanks! The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B is...
- by szDave
Wed Jan 23, 2013 2:56 am- Forum: Problem Solving
- Topic: Proportionality
- Replies: 1
- Views: 1226
- by szDave
Tue Jan 22, 2013 12:07 pm- Forum: Sentence Correction
- Topic: The list of animals
- Replies: 5
- Views: 1080
- by szDave
Tue Jan 22, 2013 8:13 am- Forum: Sentence Correction
- Topic: Charles Lindbergh
- Replies: 4
- Views: 1117
Is it D, because the list of animals that exhibit - exhibit refers to the animals? and has been expanded refers to the list?
- by szDave
Tue Jan 22, 2013 8:06 am- Forum: Sentence Correction
- Topic: The list of animals
- Replies: 5
- Views: 1080