Quantcast
Channel: The Beat The GMAT Forum - Expert GMAT Help & MBA Admissions Advice
Viewing all 156208 articles
Browse latest View live
↧

Problem Solving :: RE: In the first half of the season a football team

June 24, 2013, 6:41 am
$
0
0
Author: GMATGuruNY
Posted: Mon Jun 24, 2013 6:41 am (GMT -7)

guerrero wrote:
In the first half of the season a football team participating in the local league won 40% of its matches. It then went on to win all its matches except two in the second half of the season. If it is known that for the entire season the percentage of matches won by the team was 66.67% and that the team played double the number of matches in the second half of the season as compared to the first half of the season then how many matches did the team play in the first half of the season?

(A) 2
(B) 5
(C) 10
(D) 15
(E) 20

OAB
An alternate approach is to plug in the answers, which represent the number of games played in the first half of the season.

Answer choice C: first half = 10 games
Since twice as many games are played in the second half of the season, second half = 20 games.
Total games = 10+20 = 30.

Since 2/3 of all of the games are won, total won = (2/3)30 = 20.
Since 2/5 of the games in the first half are won, the number won in the first half = (2/5)10 = 4.

Thus, the number won in the second half = total won - number won in the first half = 20-4 = 16.
Thus, the number LOST in the second half = total games in the second half - number won = 20-16 = 4.

Doesn't work: only 2 games should be lost in the second half.
Since the number lost in the second half is TWICE what is required, all of the values in the problem -- including the number of games played in the first half -- must decrease by 1/2.

The correct answer is B.
_________________
Mitch Hunt
GMAT Private Tutor and Instructor
GMATGuruNY@gmail.com
If you find one of my posts helpful, please take a moment to click on the "Thank" icon.
Contact me about long distance tutoring!
↧
Search

Problem Solving :: Combinations or Counting??

June 24, 2013, 6:47 am
$
0
0
Author: MBAsa
Subject: Combinations or Counting??
Posted: Mon Jun 24, 2013 6:47 am (GMT -7)

A certain league has four divisions. The respective divisions had 9, 10, 11, and 12 teams qualify for the playoffs. Each division held its own double-elimination tournament -- where a team is eliminated from the tournament upon losing two games -- in order to determine its champion. The four division champions then played in a single-elimination tournament -- where a team is eliminated upon losing one game -- in order to determine the overall league champion. Assuming that there were no ties and no forfeits, what is the maximum number of games that could have been played in order to determine the overall league champion?

(A) 79 (B) 83 (C) 85 (D) 87 (E) 88
↧
↧

Problem Solving :: RE: Probability

June 24, 2013, 7:07 am
$
0
0
Author: Brent@GMATPrepNow
Posted: Mon Jun 24, 2013 7:07 am (GMT -7)

If you want to focus on one topic at a time, you can use BTG's tagging feature to isolate one concept. For example, here are all of the questions tagged as probability questions: http://www.beatthegmat.com/forums/tags/gmat-math/probability

See the left side of that linked page for more tag options.

Cheers,
Brent
_________________
Brent Hanneson - GMAT Prep Now instructor
- Check out GMAT Prep Now’s online course at http://www.gmatprepnow.com/
- Use our video course in conjunction withBeat The GMAT's free 60-Day Study Guide
- Watch hours of free videos on DS, RC and AWA
- Our top 3 free videos:
1) The Double Matrix method
2) Calculating combinations in your head
3) Managing your time on the GMAT
↧

Sentence Correction :: kaplan sc 2

June 24, 2013, 7:11 am
$
0
0
Author: hemant_rajput
Subject: kaplan sc 2
Posted: Mon Jun 24, 2013 7:11 am (GMT -7)

The advice given to test takers that they should not study the day before a test is particularly relevant for standardized tests in which memorization plays a small role, because test takers who jam their heads full of information are often worse off compared to that of test takers who relax on the previous day.
a. compared to that of
b. compared to those
c. than
d. than those
e. as

OA:C

Please provide reasons for eliminating each option.
_________________
I'm no expert, just trying to work on my skills. If I've made any mistakes please bear with me.
↧

Problem Solving :: RE: Combinations or Counting??

June 24, 2013, 7:22 am
$
0
0
Author: Brent@GMATPrepNow
Posted: Mon Jun 24, 2013 7:22 am (GMT -7)

MBAsa wrote:
A certain league has four divisions. The respective divisions had 9, 10, 11, and 12 teams qualify for the playoffs. Each division held its own double-elimination tournament -- where a team is eliminated from the tournament upon losing two games -- in order to determine its champion. The four division champions then played in a single-elimination tournament -- where a team is eliminated upon losing one game -- in order to determine the overall league champion. Assuming that there were no ties and no forfeits, what is the maximum number of games that could have been played in order to determine the overall league champion?

(A) 79 (B) 83 (C) 85 (D) 87 (E) 88
Phew, that's a long question! Probably a little too long for the GMAT quant section. That said, here's one approach.

In every game, there's 1 win and 1 loss. So, let's just count the losses.

Each division held its own double-elimination tournament
In a certain division, the maximum games will occur when all but one team loses 2 games AND the top team loses 1 game.
Let's refer to as the best team in a division as the TOP team, and refer to eliminated teams as LOSING teams.

So, in the 9-team division, we have 8 LOSING teams and 1 TOP team.
In the 10-team division, we have 9 LOSING teams and 1 TOP team.
In the 11-team division, we have 10 LOSING teams and 1 TOP team.
In the 12-team division, we have 11 LOSING teams and 1 TOP team.

So, in the first round there were 38 LOSING teams altogether, so they lost a total of 76 games (since these LOSING teams lost 2 games each)
Also, in the first round there were 4 TOP teams altogether, so they lost a total of 4 games (since they lost 1 game each)

So, in the first round, there were 76 + 4 games (80 games) altogether.


In the next round there are 4 TOP teams remaining.
With each game, 1 team is eliminated (since this is a single-elimination tournament)
So, to eliminate 3 of the teams (and thus determine a champion), we must play 3 games.

So, the maximum number of games = 80 + 3 = 83 = B

Cheers,
Brent
_________________
Brent Hanneson - GMAT Prep Now instructor
- Check out GMAT Prep Now’s online course at http://www.gmatprepnow.com/
- Use our video course in conjunction withBeat The GMAT's free 60-Day Study Guide
- Watch hours of free videos on DS, RC and AWA
- Our top 3 free videos:
1) The Double Matrix method
2) Calculating combinations in your head
3) Managing your time on the GMAT
↧
↧

GMAT Strategy :: RE: Urgent Help Needed with GMAT Prep

June 24, 2013, 7:32 am
$
0
0
Author: Brent@GMATPrepNow
Posted: Mon Jun 24, 2013 7:32 am (GMT -7)

This has been going on for some time now (see http://www.beatthegmat.com/how-do-i-review-the-questions-gmatprep-question-pack-t124997.html) , but I thought the test-makers had fixed it for the most recent product. Perhaps not (see http://www.beatthegmat.com/unable-to-review-the-incorrect-questions-t255024.html)

You might want to post your question in the Ask the Test Maker forum: http://www.beatthegmat.com/ask-the-test-maker-f71-50.html

Cheers,
Brent
_________________
Brent Hanneson - GMAT Prep Now instructor
- Check out GMAT Prep Now’s online course at http://www.gmatprepnow.com/
- Use our video course in conjunction withBeat The GMAT's free 60-Day Study Guide
- Watch hours of free videos on DS, RC and AWA
- Our top 3 free videos:
1) The Double Matrix method
2) Calculating combinations in your head
3) Managing your time on the GMAT
↧

I just Beat The GMAT! :: RE: Expecting 670-700

June 24, 2013, 7:34 am
$
0
0
Author: Brent@GMATPrepNow
Posted: Mon Jun 24, 2013 7:34 am (GMT -7)

Let us know how the test went.

All the best,
Brent
_________________
Brent Hanneson - GMAT Prep Now instructor
- Check out GMAT Prep Now’s online course at http://www.gmatprepnow.com/
- Use our video course in conjunction withBeat The GMAT's free 60-Day Study Guide
- Watch hours of free videos on DS, RC and AWA
- Our top 3 free videos:
1) The Double Matrix method
2) Calculating combinations in your head
3) Managing your time on the GMAT
↧

Sentence Correction :: kaplan sc 3

June 24, 2013, 7:39 am
$
0
0
Author: hemant_rajput
Subject: kaplan sc 3
Posted: Mon Jun 24, 2013 7:39 am (GMT -7)

To portray virtue as a function of simplicity by using the "noble savage" image, according to which the nature of a being is naive and, therefore, noble, is following in a long tradition of chroniclers, from Columbus to Steinbeck.
a. and, therefore, noble, is following in
b. and, so, noble, was following
c. and, therefore, noble, is to follow in
d. but also noble, was to follow
e. but is noble as well, is following in

OA:C
_________________
I'm no expert, just trying to work on my skills. If I've made any mistakes please bear with me.
↧
Search

Sentence Correction :: More than fifty years after the Second World War, a number o

June 24, 2013, 7:46 am
$
0
0
Author: varun289
Subject: More than fifty years after the Second World War, a number o
Posted: Mon Jun 24, 2013 7:46 am (GMT -7)

More than fifty years after the Second World War, a number of African American soldiers were
awarded―some of them posthumously―with the Congressional Medal of Honor, which was the
nation’s highest military award, and which was long overdue in recognition of their outstanding
bravery.
A. with the Congressional Medal of Honor, which was the nation’s highest military award, and
which was long overdue in
B. with the Congressional Medal of Honor, the nation’s highest military award for long-overdue
C. the Congressional Medal of Honor, which was the nation’s highest military award, long-overdue
in
D. the CongressionalMedal of Honor, the nation’s highest military award for long-overdue
E. the Congressional Medal of Honor, the nation’s highest military award, in long-overdue

why not C ??
↧
↧

Sentence Correction :: RE: kaplan sc 2

June 24, 2013, 8:03 am
$
0
0
Author: vivekchandrams
Posted: Mon Jun 24, 2013 8:03 am (GMT -7)

Hey mate,

What are we comparing here? Two kinds of test takers. One who jam their heads and others who don't.

A) what is it comparing? Test takers .... compared to that of test takers ..... Comparison wrong.

B) Test takers who... compared to those test takers who... Such a lengthy comparison. And isn't it a bot awkward, too. Especially when you have simpler choices that follow

C) Test takers who ...than test takers who.. Perfect comparison. Neat and meaningful

D) than those.. Why use those when just 'than' works?

E) as - wrong word used for the comparison.


Hence IMO C
↧

I just Beat The GMAT! :: A not so promising result ... Any help?

June 24, 2013, 8:08 am
$
0
0
Author: Darth1980
Subject: A not so promising result ... Any help?
Posted: Mon Jun 24, 2013 8:08 am (GMT -7)

Hello guys,

Its been since some weeks that i have been looking at this forum, and i feel the duty to post mu (until now) pretty sad story. I need to say that over the last weeks/months i have not felt alone in trying to beat the gmat reading at this forum. Anyhow here is the story, i took the gmat few weeks back and did really bad, i studied pretty much in my own using materials like 800score.com and the official guide .... I did really bad 520 (i am really asshamed to say that) ... I ddi the tets wi fever and i felt that this had some imapct on my performace ...

I have spent last month studing again, now complementing with kaplan 800 book, and the ogmst verbal and quant ... Guess what i only scored 570 ... Actuslly i improved on verbal V25 -> V32 ( not impressive) but reduced my performace in math. Im stonished since at home i was performing arround the 680 - 700 area and specially inquant i was allwaysnhitting the 46-47 area on a bad day ...

I think i need a better strategic approach, any tip?
↧

Problem Solving :: RE: How many triangles on the coordinate plane

June 24, 2013, 8:31 am
$
0
0
Author: Imsukhi
Posted: Mon Jun 24, 2013 8:31 am (GMT -7)

Hey! Can come one explain how come there are 9 points in the plane ?
↧

Problem Solving :: RE: How many triangles on the coordinate plane

June 24, 2013, 8:33 am
$
0
0
Author: Brent@GMATPrepNow
Posted: Mon Jun 24, 2013 8:33 am (GMT -7)

Imsukhi wrote:
Hey! Can come one explain how come there are 9 points in the plane ?
Because we are limiting the vertices to integer coordinates only.
These coordinates, (x,y), must satisfy 1 ≤ x ≤ 3 and 1 ≤ y ≤ 3

Cheers,
Brent
_________________
Brent Hanneson - GMAT Prep Now instructor
- Check out GMAT Prep Now’s online course at http://www.gmatprepnow.com/
- Use our video course in conjunction withBeat The GMAT's free 60-Day Study Guide
- Watch hours of free videos on DS, RC and AWA
- Our top 3 free videos:
1) The Double Matrix method
2) Calculating combinations in your head
3) Managing your time on the GMAT
↧
↧

Sentence Correction :: RE: kaplan sc 2

June 24, 2013, 8:35 am
↧

Sentence Correction :: RE: kaplan sc 2

June 24, 2013, 8:36 am
$
0
0
Author: hemant_rajput
Posted: Mon Jun 24, 2013 8:36 am (GMT -7)

why is the use of than those is incorrect, is it because of wordiness or something else?
_________________
I'm no expert, just trying to work on my skills. If I've made any mistakes please bear with me.
↧
Search

Sentence Correction :: RE: More than fifty years after the Second World War, a number o

June 24, 2013, 8:37 am
↧

Problem Solving :: kaplan problem solving

June 24, 2013, 9:05 am
$
0
0
Author: hemant_rajput
Subject: kaplan problem solving
Posted: Mon Jun 24, 2013 9:05 am (GMT -7)

Three is the largest number that can be divided evenly into 27 and the positive integer x, while 10 is the largest number that can be divided evenly into both 100 and x. Which of the following is the largest possible number that could be divided into x and 2,100?
a.30
b.70
c.210
d.300
e.700

OA:C
what does it mean when you say 3 divide evenly into 27 and x?
_________________
I'm no expert, just trying to work on my skills. If I've made any mistakes please bear with me.
↧
↧

Problem Solving :: RE: kaplan problem solving

June 24, 2013, 9:14 am
$
0
0
Author: Brent@GMATPrepNow
Posted: Mon Jun 24, 2013 9:14 am (GMT -7)

hemant_rajput wrote:
Three is the largest number that can be divided evenly into 27 and the positive integer x, while 10 is the largest number that can be divided evenly into both 100 and x. Which of the following is the largest possible number that could be divided into x and 2,100?
a.30
b.70
c.210
d.300
e.700

OA:C
what does it mean when you say 3 divide evenly into 27 and x?
what does it mean when you say 3 divide evenly into 27 and x?
The wording here could be improved. The GMAT would never write "x divides evenly into y" since this could give one the impression that y divided by x must be an even number.
In everyday, informal speech, saying that x divides evenly into y is the same as saying that x is a divisor of y.

For this question, the GMAT test-makers would probably write something like "3 is greatest common divisor of x and 27"


A fast approach here is to use the process of elimination (POE).

E) Can x=700? No - otherwise the greatest common divisor of x and 100 would be 100 (where the question tells us that the GCD of x and 100 is 10)

D) Can x=300? No - otherwise the greatest common divisor of x and 100 would be 100 (where the question tells us that the GCD of x and 100 is 10)

C) Can x=210? Sure, the GCD of 210 and 27 is 3, and the GCD of 210 and 100 is 10
SO, if x=210, then the GCD of x and 2100 will be 210
The answer is C

Cheers,
Brent
_________________
Brent Hanneson - GMAT Prep Now instructor
- Check out GMAT Prep Now’s online course at http://www.gmatprepnow.com/
- Use our video course in conjunction withBeat The GMAT's free 60-Day Study Guide
- Watch hours of free videos on DS, RC and AWA
- Our top 3 free videos:
1) The Double Matrix method
2) Calculating combinations in your head
3) Managing your time on the GMAT
↧

Data Sufficiency :: RE: Students in Class

June 24, 2013, 9:19 am
$
0
0
Author: hjafferi
Posted: Mon Jun 24, 2013 9:19 am (GMT -7)

thanks...great way to solve....Smile

but i have my doubts.

If i put in value of x as 20 and y as 80. the sum is 100 and the total passed are 51. Hence the percentage is more than 50%. Similarly as you have put in value of x as 20 and y as 40. the passing percentage is less than 50%.

Similarly for premise 2 i put in value of x as 1 and y 21 (as the question says that y is 20 more than x) the passing percentage is more than 50%. Also if i put the values as x as 1000 and y as 1020 then the passing percentage is less than 50%.

In my opinion the answer should be E as both statements are insufficient. unless i am missing something.
↧

GMAT Essays (AWA) :: Argument Essay Ranking

June 24, 2013, 9:21 am
$
0
0
Author: dado
Subject: Argument Essay Ranking
Posted: Mon Jun 24, 2013 9:21 am (GMT -7)

Dear Members,

I registered for the GMAT and I am practicing the AWA. I would highly appreciate your review and feedback. I would highly appreciate your comments and rates. Thank you.

Argument:

“When the Apogee Company had all its operations in one location, it was more profitable than it is today. Therefore, the Apogee Company should close down its field offices and conduct all its operations from a single location. Such centralization would improve profitability by cutting costs and helping the company maintain better supervision of all employees.”

Essay:

The argument states that the Apogee Company in previous years was more profitable than it is today and the reason falls out to be the operation in one location as claimed by the author. Recommending from the company to close all its offices and stick to centralization which in his/her view improves profitability and cuts costs. This argument is flawed for several reasons, where the author assumed that operating in one location is more profitable for the company from having several offices without showing any clear or convincing evidence, as well as calling for centralization without a convincing reason.
First, the author base his assumption of profitability upon weak ground, with only showing that the company nowadays seemed to be less profitable than before, and not providing any reason for such result. To illustrate, the memorandum didn’t include any clue about current or previous kind of operations, the size of such operations, the costs, or even the economic situation of the location where the Agopee Company is performing. Furthermore, the correlation between profitability and number of offices is weak and unsupported with clear facts. Clearly, the argument could have been strengthened if necessary data regarding the size of operations or the crisis that the company has passed through could have been stated.
Second, it was readily claimed that the Apogee Company should close its offices, and seek centralization which will improve profitability by cutting costs, and providing better employee supervision. This is again a weak and unconvincing flaw where it was supposed that centralization is the only way out for profitability without taking in to consideration the costs behind downsizing or the losses which the company will have from losing part of its market share. As an example of this, centralization may have several disadvantages for the company such as losing large number of customers or relations. In fact, there is no clear evidence provided where this could have been more convincing by stating the benefits of centralization or the need of the company to downsize or the reflection of real costs.
Finally, this argument tends to be of no clear convincing evidence, since the author based his/her decisions upon weak and no clear facts. Without outstanding answers to these questions, one is left with the impression that the claim is more of a wishful thinking rather than substantive evidence.

In conclusion, the argument is flawed for the above mentioned reasons of supposing that the one office company if more profitable than several offices one without giving facts or sufficient data for such claim, as well as stating that centralization is the best way out where there could be no relation between it and profitability. In order to assess the merits of a certain situation, it is essential to have full knowledge of the contributing factors. In this particular case, the size of operations, kind of operations, need of centralization, and the contribution to cost downsizing. Without these information, the argument remains open to debate.
↧
Viewing all 156208 articles
Browse latest View live
Search
<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>