Search found 30 matches
Re: cats and dogs
Hi, You clearly made a mistake in writing the question so I will assume that the question reads "1/5 of the cats and 1/4 of the dogs". The problem here is that we do not have the ratio of dogs to cats but we know that the number of pets adopted would be higher if the ratio of dogs to cats ...
- by Ossa
Sat Apr 25, 2009 5:46 am- Forum: Problem Solving
- Topic: cats and dogs
- Replies: 1
- Views: 1435
Re: equilateral triangle area
Hi, The area of any triangle=1/2(base*height) The equilateral traingle can be divided into two 30, 60, 90 triangles that have a base=x, height=x.SQRT(2) and the hypotenuse=2x. Where x=1/2 the side of the big triangle. Accordingly the area=1/2 (side).(SQRT (2).side/2)=1/4 (side)^2 . SQRT(2) Hi there,...
- by Ossa
Wed Apr 15, 2009 1:04 pm- Forum: GMAT Math
- Topic: equilateral triangle area
- Replies: 2
- Views: 1505
Re: price promotions on sales
Hi Yang, You posted this in the wrong forum. Extensive research has shown that the effects of short-term price promotions on sales are themselves short-term. Companies’ hopes that promotions might have a positive aftereffect have not been borne out for reasons that researchers have been able to iden...
- by Ossa
Wed Apr 15, 2009 12:46 pm- Forum: Problem Solving
- Topic: price promotions on sales
- Replies: 2
- Views: 2288
Re: GMAT prep 1 DS question
The difference between the angles x, and y is the key as Musiq showed. The second statement is irrelevant because it does not show the relationship between the two angles, but the first statement does. Hi All, I did a search to find answer to this DS problem but failed. Please have a look and let me...
- by Ossa
Mon Apr 06, 2009 3:17 pm- Forum: Data Sufficiency
- Topic: GMAT prep 1 DS question
- Replies: 2
- Views: 1219
Re: Careless/Simple/Stupid Mistakes
Sometimes you make mistakes when you take shortcuts and make calculations in your mind. If you have the time, right down the steps. You will make less obvious mistakes when you see things visually. I have been making a lot of really careless mistakes lately, and I mean really careless. Things like 5...
- by Ossa
Mon Apr 06, 2009 3:04 pm- Forum: Problem Solving
- Topic: Careless/Simple/Stupid Mistakes
- Replies: 3
- Views: 1792
Re: 20 mile course
Unless she took a break, I also think the answer is B. On a 20 mile course, Pat bicycled at an avg rate of 39 miles / h for the first 12 min and , without a break, ran the rest of the distance at an avg rat of 8 miles / h. How many minutes did Pat take to cover the entire course ? A. 75 B. 105 C. 11...
- by Ossa
Wed Mar 25, 2009 6:08 am- Forum: Problem Solving
- Topic: 20 mile course
- Replies: 10
- Views: 1806
Re: Algebra & Manufacturer
I think if you step back a second and think about this, you would be able to find the answer quickly. If we save $x per unit and lose $y/day per unit, then you need x/y days to breakeven. Remark: as a double check you can also exclude all the options with n, since both x and y are in dollars per uni...
- by Ossa
Wed Mar 25, 2009 5:14 am- Forum: Problem Solving
- Topic: Algebra & Manufacturer
- Replies: 3
- Views: 1681
Re: factor this out
Just remember that the key to this is: x^(a-b)=(x^a)/(x^b).
semidevil wrote:5^k - 5^(k-1)
how do I factor this to become:
5^k - (1/5)5^k
(1-(1/5))5^k)
(4/5)5^k.
Is there some number properties Im missing?
this is from Eric's flashcards.
- by Ossa
Wed Mar 25, 2009 5:03 am- Forum: Problem Solving
- Topic: factor this out
- Replies: 2
- Views: 1153
Re: Sequence
I also think that the best way is to estimate. Keep in mind that you have limited time to answer all the questions. By eliminating some of the clearly wrong choices, you are only dealing with the last two choices. Go ahead and read the answer posted before and let me know if you are still having tro...
- by Ossa
Wed Mar 11, 2009 3:48 pm- Forum: Problem Solving
- Topic: Sequence
- Replies: 3
- Views: 1283
Another similar way
Hi, Here is another way that is very similar. If x is the hypotenuse, then the 2 sides will be equal to x/SQRT 2 then, x/(SQRT 2)+x/(SQRT 2)+x=16(1+SQRT 2) then, x(2/(SQRT 2) +1)=16(1+SQRT 2) and accordingly, x((SQRT 2 +1)=16 (1+SQRT 2), and so x=16 thanks a lot - just wondering if a quicker way (sh...
- by Ossa
Fri Mar 06, 2009 6:04 am- Forum: Problem Solving
- Topic: Hypoteneuse of the triangle
- Replies: 7
- Views: 2598
Re: Powerprep - Geometry Question
Hi,
This question was posted before. Please see the following:
http://www.beatthegmat.com/gmat-prep-xy ... 31195.html
sam78 wrote:Guys,
Would appreciate inputs to solve the attached problem.
Thanks!
Sam
- by Ossa
Sun Mar 01, 2009 4:33 pm- Forum: Problem Solving
- Topic: Powerprep - Geometry Question
- Replies: 2
- Views: 1407
Correct
Correct.
The plane takes 9 hours to reach Toronto and so it arrives at 8:45 London time which is 3:45 pm Toronto time.
Rag_gmat wrote:IMO it is 3:45
- by Ossa
Fri Feb 27, 2009 5:05 am- Forum: Problem Solving
- Topic: London time
- Replies: 3
- Views: 1447
Re: Scale measure problem
If the reading on the scale is 4, then the intensity is 10 times the intensity of 3. If the reading is 5, then the intensity is 10 time the intensity at 4 which is equal to 100 times the intensity at 3, and so one. Accordingly the intensity at 8 is 10^5 that of 3. On a scale that measures the intens...
- by Ossa
Mon Feb 23, 2009 4:35 pm- Forum: Problem Solving
- Topic: Scale measure problem
- Replies: 2
- Views: 1283
Re: Standart deviation
Just to clarify, Standard deviation is a measure of dispersion of points around a certain mean and that is why subtracting the same number from all values only shifts the mean but dispersion remains the same and so the standard deviation does not change.
4meonly wrote:OA D
- by Ossa
Mon Feb 23, 2009 4:03 pm- Forum: Problem Solving
- Topic: Standart deviation
- Replies: 5
- Views: 1495
Re: x and y
Hi, Here is an easy way: Since y is much larger than x, then the equation can be simplified to y/xy which is equal to 1/x. Accordingly the value of the equation is between 1/.02 and 1/.1, or between 50 and 10, so the answer is 15 (B). OA [spoiler]soon :-)[/spoiler] http://www.postimage.org/gx1e7W5J....
- by Ossa
Fri Feb 20, 2009 7:03 pm- Forum: Problem Solving
- Topic: x and y
- Replies: 3
- Views: 1260