Search found 78 matches
First, you have to understand what f(1-x) does. As Neo2000 stated, it means every time you see an 'x', substitute it with '(1-x)'. For example, f(x) = 1-x Then f(1-x) = 1-(1-x) = 1-1+x = x For this problem, you need find the solution where f(x) and f(1-x) are the same. If you test each answer choic...
- by preciousrain7
Sat Apr 19, 2008 11:09 am- Forum: Problem Solving
- Topic: Simple one...still pls explain
- Replies: 4
- Views: 1620
Ahhh.... I made the mistake of thinking if you sq any # it'll be an integer. Thanks a bunch!tmmyc wrote:Statement 1:
n^2 = 4
n = 2
YES
n^2 = 5
n = sqrt(5)
NO
Insufficient.
Statement 2:
Sufficient since any integer squared is also an integer.
Example
sqrt(n) = 2
n = 4
- by preciousrain7
Sat Apr 19, 2008 11:07 am- Forum: Data Sufficiency
- Topic: OG question 11th ed
- Replies: 3
- Views: 1757
Re: Manhattan GMAT Test: Percent
I am having a hard time understanding the language in the problem. Thanks in advance! A retailer bought a shirt at wholesale and marked it up 80% to its initial retail price of $45. By how many more dollars does he need to increase the price to achieve a 100% markup? a. 1 b. 2 c. 3 d. 4 e. 5 answer...
- by preciousrain7
Sat Apr 19, 2008 11:06 am- Forum: Problem Solving
- Topic: Manhattan GMAT Test: Percent
- Replies: 6
- Views: 3740
In place of X you simply substitute (1-X) and see for which of the functions you get the same value that you started off with. A must do question since the choice doesnt have "None of these" thereby letting you know that one of the options must be the correct answer. I'm having a hard tim...
- by preciousrain7
Mon Apr 14, 2008 2:42 pm- Forum: Problem Solving
- Topic: Simple one...still pls explain
- Replies: 4
- Views: 1620
Next time, please post the questions in the thread itself. Makes it easier for all to answer. Q1. At the very least n has to be 30 or multiples thereof. Prime factors of 30 are 2,3 and 5 Thus 3 different factors. Q2. The problem states 1X +2Y +3Z = 1.5(X+Y+Z) Simplify this to get your answer For Q3...
- by preciousrain7
Mon Apr 14, 2008 2:18 pm- Forum: Problem Solving
- Topic: GMAT Prep Help!!!
- Replies: 4
- Views: 1825
read it actively (start thinking mentally as you read the problem) & you will not have any problem what so ever.. A retailer bought a shirt at wholesale (X) and marked it up 80% (marked it up 80%, i.e. 180X/100)to its initial retail price of $45 (hmm, so that means 180X/100 = 45). By how many m...
- by preciousrain7
Sun Apr 13, 2008 1:45 pm- Forum: Problem Solving
- Topic: Manhattan GMAT Test: Percent
- Replies: 6
- Views: 3740
Manhattan GMAT Test: Percent
I am having a hard time understanding the language in the problem. Thanks in advance! A retailer bought a shirt at wholesale and marked it up 80% to its initial retail price of $45. By how many more dollars does he need to increase the price to achieve a 100% markup? a. 1 b. 2 c. 3 d. 4 e. 5 answer ...
- by preciousrain7
Sun Apr 13, 2008 10:42 am- Forum: Problem Solving
- Topic: Manhattan GMAT Test: Percent
- Replies: 6
- Views: 3740
Statement 1: Now see that when we add 7 to 2k-4, we get 2k+3. So 2k-4, which is divisible by 7, plus 7, which will also be divisible by 7, is 2k+3. Since n = 2k+3, it will be divisible by 7. Sufficient. (Example: If 2k-4 = 14, then 2k+3=21 and both are divisible by 7.) THANK YOU! I finally understa...
- by preciousrain7
Sat Apr 12, 2008 10:27 am- Forum: Data Sufficiency
- Topic: OG Extra Math review book
- Replies: 4
- Views: 1715
OG Extra Math review book
if k and n are integers, is n divisible by 7?
1. n-3=2k
2. 2k-4 is divisible by 7
thank you in advance for your help
- by preciousrain7
Fri Apr 11, 2008 12:25 pm- Forum: Data Sufficiency
- Topic: OG Extra Math review book
- Replies: 4
- Views: 1715
OG question 11th ed
Is n an integer?
1. n^2 is an integer
2. sqrt(n) is an integer
Thanks in advance for your help
- by preciousrain7
Fri Apr 11, 2008 12:23 pm- Forum: Data Sufficiency
- Topic: OG question 11th ed
- Replies: 3
- Views: 1757
Re: dont count
just keep going as normal b/c you dont know which questions are not being counted.... you have to treat each question as if they are being graded. hope that helpsEnginpasa1 wrote:hwo do the 20% not count? How can I factor this into my studies. Or should I just keep going as normal?
- by preciousrain7
Mon Mar 31, 2008 1:32 pm- Forum: Problem Solving
- Topic: Algebra Eq
- Replies: 16
- Views: 3948
- by preciousrain7
Mon Mar 31, 2008 1:01 pm- Forum: Problem Solving
- Topic: Algebra Eq
- Replies: 16
- Views: 3948
Stuart, I'm not having a problem with the algebra portion but rather with your assumption that 1/8 of the people who took history also took math. We know that some portion (x/12+10) took both math and history and 1/8 of the TOTAL took history - can't that 1/8 include both, students who took math+hi...
- by preciousrain7
Thu Mar 27, 2008 8:08 am- Forum: Problem Solving
- Topic: Algebra Eq
- Replies: 16
- Views: 3948
Algebra Eq
In a certain school, 40 more than 1/3 of all the students are taking a math course and 1/4 of those taking a math course are taking history course. If 1/8 of all the students in the school are taking history course, how many students are in the school? A. 240 B. 300 C. 480 D. 720 E. 960 Much appreci...
- by preciousrain7
Mon Mar 24, 2008 4:19 pm- Forum: Problem Solving
- Topic: Algebra Eq
- Replies: 16
- Views: 3948
thanks!xilef wrote:It takes both working together (one of each machine) to do the job in 12hrs. The company used the same number of each type of machine to do the job in 2 hours, which is 6 times faster than the the time it takes one of each machine to do the job, therefore, company used 6 of each.
- by preciousrain7
Mon Mar 24, 2008 2:31 pm- Forum: Problem Solving
- Topic: GMAT PREP????
- Replies: 7
- Views: 3379