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Re: GMAT Flashcards [#permalink] New post 28 Mar 2012, 16:40
I'm confused on the Volume/Mixture Problems (Hard) question on page 38.

Could someone pls explain what is the purpose of (x‐15)(y+4)=(x+20)(y‐3)?

I understand that it is # of chickens x # of days of feed left, but what does this mean?

Thanks a lot,
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Re: GMAT Flashcards [#permalink] New post 05 Apr 2012, 06:47
Wow I found this to be very useful if you tackle this before taking on the OG you'll be surprised on your results!!
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Re: GMAT Flashcards [#permalink] New post 09 Apr 2012, 01:48
I now have some resources that I can constantly look over daily to remember the stuff I should be learning.
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Re: GMAT Flashcards [#permalink] New post 10 Apr 2012, 11:07
The office of 120 is split between male and female
employees at the ratio of 3:5. If 40% of the
employees are married and 20 of the married
employees in the office are men, how many of the
women working in the office are single?

In your matrix you drew, where are you getting 45 and 75? It just seems like you are pulling them out of thin air.

Note: Above question was posted by RyanP, though I have the same question.

Answer provided was:

the ratio is 3:5, so that means if you divide 120 by (3+5), you will get 15.
Now multiply 3 by 15 and 5 by 15 and you get those numbers (yes, out of thin air though with the help of some math)

Can someone please explain the reason why you can do 120 / by (3+5)? Also any alternative solution to this type of question without drawing a matrix? Thanks!
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Re: GMAT Flashcards [#permalink] New post 10 Apr 2012, 11:34
Expert's post
catty2004 wrote:
The office of 120 is split between male and female
employees at the ratio of 3:5. If 40% of the
employees are married and 20 of the married
employees in the office are men, how many of the
women working in the office are single?

In your matrix you drew, where are you getting 45 and 75? It just seems like you are pulling them out of thin air.

Note: Above question was posted by RyanP, though I have the same question.

Answer provided was:

the ratio is 3:5, so that means if you divide 120 by (3+5), you will get 15.
Now multiply 3 by 15 and 5 by 15 and you get those numbers (yes, out of thin air though with the help of some math)

Can someone please explain the reason why you can do 120 / by (3+5)? Also any alternative solution to this type of question without drawing a matrix? Thanks!


We know that there is a ratio of 3:5.
We must understand how ratios work to be able to solve the problem.

The minimum number of people in the office is 8 - do you agree? (If not, this is the question to address)
The next possible number is 16, 24, 32, etc ..... 120.

Does this help?
P.S. the matrix/table is the easiest way to solve this question. It is quite a math exercise to solve it with equations.
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Re: GMAT Flashcards [#permalink] New post 11 Apr 2012, 19:13
catty2004 wrote:
The office of 120 is split between male and female
employees at the ratio of 3:5. If 40% of the
employees are married and 20 of the married
employees in the office are men, how many of the
women working in the office are single?

In your matrix you drew, where are you getting 45 and 75? It just seems like you are pulling them out of thin air.

Note: Above question was posted by RyanP, though I have the same question.

Answer provided was:

the ratio is 3:5, so that means if you divide 120 by (3+5), you will get 15.
Now multiply 3 by 15 and 5 by 15 and you get those numbers (yes, out of thin air though with the help of some math)

Can someone please explain the reason why you can do 120 / by (3+5)? Also any alternative solution to this type of question without drawing a matrix? Thanks!



Let us say that the no of male employee is 3x.So the no of female employees would be 5x (male/Female=3x/5x=3/5)
Therefore total no of employees would be 3x+5x=8x.Also given that total no of employees is 120
so 8x=120=> x=15
hence no of male= 3x=3*15=45
and no of female = 5x=75
Hope this clears
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Re: GMAT Flashcards [#permalink] New post 18 Apr 2012, 08:45
Great resource, better than another set of flashcards I recieved.
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Re: GMAT Flashcards [#permalink] New post 23 Apr 2012, 18:17
Going to try this on my Iconia 500 :D

TYVM!
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Re: GMAT Flashcards [#permalink] New post 03 May 2012, 19:15
Thanks for the flashcards. so very helpful! :)
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Re: GMAT Flashcards [#permalink] New post 25 May 2012, 01:56
Excellent last minute prep . Will Study and if found too good will award u additional kudos!

Keep up the good work buddy

Oh! Forgot to say thank you so much, a million thanks
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Re: GMAT Flashcards [#permalink] New post 16 Jul 2012, 15:45
how can I import this into gmat app flashcards via email?
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Re: GMAT Flashcards [#permalink] New post 18 Jul 2012, 14:20
Thank you. Looking forward to using the flashcards. Are these all flashcards that are already loaded on the iPad app? Just downloaded the iPad app yesterday
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Re: GMAT Flashcards [#permalink] New post 19 Jul 2012, 07:23
These cards are great. Probably not the safest thing to do, but I keep them in my car and study while driving. A safer route is studying while another (who doesn't mind reading them to you) is in the car to participate. A great tool - thanks BB!
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Re: GMAT Flashcards [#permalink] New post 20 Jul 2012, 00:51
Thanx bb the flash cards are very helpful. Is there a possibility of an Android based app? I dont have an iphone :(
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Re: GMAT Flashcards [#permalink] New post 08 Aug 2012, 12:38
Wonderful collection. Thank you.
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Re: GMAT Flashcards [#permalink] New post 08 Aug 2012, 17:29
These flash cards are amazing. Thank you
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Re: GMAT Flashcards [#permalink] New post 17 Aug 2012, 08:52
I am looking for some more resources for speed, work, & rate related questions.. where can i find them ?
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Re: GMAT Flashcards [#permalink] New post 21 Aug 2012, 03:52
More Flashcards on
EQUATIONS, INEQUALITIES, AND VICS
FRACTIONS, DECIMALS, AND PERCENTS
GEOMETRY
NUMBER PROPERTIES
SENTENCE CORRECTION
WORD TRANSLATIONS
And Much More ....
http://gmat-preparation-guide.blogspot. ... cards.html
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Re: GMAT Flashcards [#permalink] New post 13 Sep 2012, 08:08
These flash cards are truly helpful. Thanks :)
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Re: GMAT Flashcards [#permalink] New post 23 Sep 2012, 20:24
Is there any tool to allow me to edit/create flashcards in Windows and then import these flashcards back to GMAT/GRE ToolKit ? Customizing my own flashcards in Iphone is painful.
Re: GMAT Flashcards   [#permalink] 23 Sep 2012, 20:24
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