Search found 138 matches
See attached as this is easier to show both with a diagram and with correct mathematical notation.
Answer = 16.
-Carrie
- by gaggleofgirls
Thu Feb 05, 2009 9:50 pm- Forum: Problem Solving
- Topic: isosceles triangle
- Replies: 5
- Views: 1711
You can prove that the ratio of the volume is the same as the ratios of the height by figuring out the area of the base... v = pi*r^2*h v1 (of the first can that is 10high) is pi*r^2*10 = 500 pi*r^2 = 50 so the area of the base = 50 For can 2 (20 height) v2 = pi*r^2 *20 pi*r^2 is the same as for the...
- by gaggleofgirls
Thu Feb 05, 2009 9:24 pm- Forum: Problem Solving
- Topic: Volume & Ratios
- Replies: 4
- Views: 1500
Thanks. This forum (and a lot of hours of studying) has really helped me to re-learn (and in some cases really learn for the fist time) this math that I knew in High School/College (which was over 22 years ago, yikes). But it has been a fun challenge to get this stuff again and good prep as my oldes...
- by gaggleofgirls
Thu Feb 05, 2009 12:01 pm- Forum: Data Sufficiency
- Topic: SETS
- Replies: 6
- Views: 1458
First, let me say that this is a HORRIBLY worded question. "How many of the 60 students..." isn't even gramatically correct ("the" doesn't make any sense without another reference, e.g. "how many of the 60 students in a class"). What's your source? Thanks for confirmin...
- by gaggleofgirls
Thu Feb 05, 2009 11:44 am- Forum: Data Sufficiency
- Topic: SETS
- Replies: 6
- Views: 1458
I agree with D. 1) $90,000 was deposited in the ratio 2:1 for 5%act to 3% act so 2/3(90,000) in the 5% act and 1/3(90,000) in the 3% act. So $30,000 in the 3% act. SUFFICIENT 2) Since the total = 90,000, lets say that x = my in the 5% act then 90,000-x = the amt in the 3% act. .05x = .03(90,000-x) =...
- by gaggleofgirls
Thu Feb 05, 2009 9:24 am- Forum: Data Sufficiency
- Topic: Surplus Funds
- Replies: 2
- Views: 1229
So DanaJ, you are saying that the reason we can't know how many took both is because we don't know how many didn't take any. In both of your examples, you are able the adjust the number of students who took both tests because you can adjust the number of students who took neither test. The formula Z...
- by gaggleofgirls
Thu Feb 05, 2009 9:06 am- Forum: Data Sufficiency
- Topic: SETS
- Replies: 6
- Views: 1458
Statement 1 says A is even and C is Odd Which means (Odd)(Even) + (even)(b) + odd = Odd If we plug in an odd number for b then we get even as an answer making the statement untrue.... Your flaw here is the even(odd) = even AND even(even) = even SO, you can't tell if b is odd or even since either wa...
- by gaggleofgirls
Wed Feb 04, 2009 8:30 pm- Forum: Data Sufficiency
- Topic: integers
- Replies: 9
- Views: 1921
Another way to do the first problem (#55) is
If you know (t-8) is a factor, then (t-8)(t+x) = t^2-kt-48
48/8 = 6 so (t-8)(t+6) = t^2-kt-48
t^2-2t-48 = t^2-kt-48
k=2
-Carrie
- by gaggleofgirls
Wed Feb 04, 2009 4:08 pm- Forum: Problem Solving
- Topic: OG Quant Review #55 & #80
- Replies: 5
- Views: 1621
There's not much to add here other than to realize that: 1) once you CAN answer the question, you don't need to go any farther. The more practice tests I take, the better I am getting at realizing when I have proven the DS answer and stopping so as to have more time for the rest of the questions. An...
- by gaggleofgirls
Wed Feb 04, 2009 5:16 am- Forum: Data Sufficiency
- Topic: XY plane
- Replies: 3
- Views: 2242
1 oa must be 18 ...to complete the job Wow, that wording is open to interpretation. I read it as "complete the entire job on his own," which would be the rate for 1 job, which is 24 hours. But I can see (maybe) how it can be read as "complete the 3/4 of the job that A+B did together,...
- by gaggleofgirls
Wed Feb 04, 2009 5:05 am- Forum: Problem Solving
- Topic: work rate
- Replies: 6
- Views: 1534
See attached file for solution - just too much strain on my eyes and brain to have all those ^2 and / in the same equation so the file has correct math formatting.
x = -7
What is OA?
Please include list of answers and OA when you post a question.
Thanks,
-Carrie
- by gaggleofgirls
Tue Feb 03, 2009 11:01 pm- Forum: Problem Solving
- Topic: solve for x
- Replies: 2
- Views: 1117
Re: work rate
A and B need two hours to produce 3000 products. If B works at half of its rate, they need three hours to finish the same work. What A's rate? A+B = 3000/2 = 1500 per hour A + B/2 = 3000/3 = 1000 per hour Here are two ways to solve it. If A + B/2 is 500 less than A + B, then B must be making 500 le...
- by gaggleofgirls
Tue Feb 03, 2009 10:00 pm- Forum: Problem Solving
- Topic: work rate
- Replies: 6
- Views: 1534
Re: work rate
Person A completed 1/4 of a certain work in two hours. Then A and B completed the remaining work in 4.5 hours. How long time will it take for B to complete the work independently? oa is 16 but i think it not right If A alone does 1/4 of the job in 2 hours, then A will do 1 job in 8 hours for a rate...
- by gaggleofgirls
Tue Feb 03, 2009 9:49 pm- Forum: Problem Solving
- Topic: work rate
- Replies: 6
- Views: 1534
Lisa - Thanks for the input; I really appreciate it. I have looked, and based on your recommendation, spent some time looking again tonight, at Executive MBA programs. The amount of travel is just not going to work from a family or financial standpoint. I have three younger children and can't be gon...
- by gaggleofgirls
Tue Feb 03, 2009 9:10 pm- Forum: Ask Stacy Blackman
- Topic: Online MBA Programs
- Replies: 2
- Views: 1186
Online MBA Programs
Hello - I am looking to go get my MBA (after 20+ years in high-tech marketing) but I do not currently live near a University and moving is not an option for my family, so I am looking at online programs. I am an experienced telecommuter and will be able to participate and enjoy an online program. Th...
- by gaggleofgirls
Tue Feb 03, 2009 4:16 pm- Forum: Ask Stacy Blackman
- Topic: Online MBA Programs
- Replies: 2
- Views: 1186