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GMAT Prep Test 2
For any positive integers n, the length of n is defined as the number of prime factors whose product is n. For example, the length of 75 is 3, since 75 = 3x5x5. How many two-digit positive integers have length 6?
Ans. Two
- by dsuna
Mon Mar 26, 2007 12:14 pm- Forum: Problem Solving
- Topic: GMAT Prep Test 2
- Replies: 2
- Views: 2081
I think for the first problem the text says "markup that was 25 percent of the selling price" not from the merchant price.
- by dsuna
Mon Mar 26, 2007 8:23 am- Forum: Problem Solving
- Topic: PS Questions - Help
- Replies: 2
- Views: 2677
GMAT Prep Test 2
A circular cloth with a diameter of 20 inches is placed on a circular tray with a diameter of 24 inches. What fraction of the tray’s surface is NOT covered by the cloth?
Ans 11/36
- by dsuna
Sun Mar 25, 2007 9:39 am- Forum: Problem Solving
- Topic: GMAT Prep Test 2
- Replies: 2
- Views: 3180
GMAT Prep Test 2
{-10, -6, -5, -4, -2.5, -1, 0, 2.5, 4, 6, 7, 10} A number is to be selected at random for the set above. What is the probability that the number selected will be a solution of the equation (x-5)(x+10)( 2x-5) = 0 Ans. 1/6 the solutions are X=5, -10 and 2.5 x=5 is not in our set, that means the probab...
- by dsuna
Sun Mar 25, 2007 9:38 am- Forum: Problem Solving
- Topic: GMAT Prep Test 2
- Replies: 1
- Views: 1954
GMAT Prep Test 2
1. If q is a positive integer less than 17 and r is the remainder when 17 is divided by q, what is the value of r?
1. q>10
2. q=2^k, where k is a positive integer
Ans. B
what I am missing here? why answer is B when we know only that k is a positive integer?
- by dsuna
Sun Mar 25, 2007 9:27 am- Forum: Data Sufficiency
- Topic: GMAT Prep Test 2
- Replies: 1
- Views: 5433
GMAT Prep Test 2
If eleven consecutive integers are listed from least to greatest, what is the average (arithmetic mean) of the eleven integers?
1.The average of the first nine integers is 7
2. The average of the last nine integers is 9
Ans. D
- by dsuna
Sun Mar 25, 2007 9:26 am- Forum: Data Sufficiency
- Topic: GMAT Prep Test 2
- Replies: 1
- Views: 3178
Re: Some questions from GMAT Prep - please help
1) If x<0 , what is square root of -x|x| I thought if x<0, |x| = -x THerefore square root becomes the root of x^2 which is + or - x I wrote the answer as x but the GMAT Prep says that answer is -x. How??? 2) Data Sufficiency: Is 1/p > r/(r^2 + 2) 1) p=r 2) r=0 Please help with this too Thanks a lot...
- by dsuna
Sun Mar 25, 2007 8:58 am- Forum: GMAT Math
- Topic: Some questions from GMAT Prep - please help
- Replies: 20
- Views: 8696
Re: Probability survey, from OG free test
In a survery of 248 people, 156 are married, 70 are self-employed, and 25 PERCENT of those who are married are self-employed. If a person is to be selected randonly what is the prob. is self-emplyed BUT NOT MARRIED? a) 1/8 b) 4/31 c) 117/248 d) 1/4 e) 31/117 Please explain the steps to reach a) 1/8...
- by dsuna
Sat Mar 24, 2007 8:34 pm- Forum: Problem Solving
- Topic: Probability survey, from OG free test
- Replies: 4
- Views: 2712
- by dsuna
Sat Mar 24, 2007 11:04 am- Forum: Data Sufficiency
- Topic: GMAT Prep question - please explain
- Replies: 1
- Views: 3353
GMAT Prep question - please explain
Is the hundredths digit of the decimal d greater than 5? 1. The tenths digit of 10d is 7 2. The thousandths digit of d/10 is 7 Ans. D Please confirm if my logic is right. Let's say the number is abc.Xde They are asking if X>5 1. 10d = 10*abc.Xde = abcX.de - where d=7 - nothing about X 2. d/10 = abc....
- by dsuna
Sat Mar 24, 2007 11:01 am- Forum: Data Sufficiency
- Topic: GMAT Prep question - please explain
- Replies: 1
- Views: 2829
GMAT Prep question - please explain
A college admission officer predicts that 20 percent of the students who are accepted will not attend the college. According to this prediction, how many students should be accepted to achieve a planned enrollment of X students?
Ans. 1.25X
- by dsuna
Sat Mar 24, 2007 10:15 am- Forum: Problem Solving
- Topic: GMAT Prep question - please explain
- Replies: 2
- Views: 2013
How about creating Subsections for GMAT Prep, OG, etc and Others? In this way we can address the question directly in the appropriate section. Instead of someone spend the time to collect all the questions in one file I think this solution will save a lot of time, will organize the questions and wil...
- by dsuna
Thu Mar 22, 2007 6:26 am- Forum: GMAT Math
- Topic: Anyone know of a list of GMATPrep question/answer bank?
- Replies: 7
- Views: 4189
- by dsuna
Mon Mar 19, 2007 9:38 am- Forum: GMAT Math
- Topic: Anyone know of a list of GMATPrep question/answer bank?
- Replies: 7
- Views: 4189
GMAT Prep 6 questions – I don't know how to solve them
Hi, I have my GMAT exam next week and I don't know how to solve these problems. Is anyone who can help me understand them? Thanks a lot. 1. In each term in the sum a1 + a2 + …..+ an is either 7 or 77 and the sum equals 350, which of the following could be equal to n? 38, 39, 40, 41, 42 following mat...
- by dsuna
Mon Mar 19, 2007 9:10 am- Forum: Problem Solving
- Topic: GMAT Prep 6 questions – I don't know how to solve them
- Replies: 20
- Views: 10687