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GMAT Flashcards

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New post 20 Jul 2017, 18:22
On page 48, Coordinate Geometry 6 and the corresponding answer, point B has 2 different values. On the Q it is (2,3) and the Answer it is (6,3).

Thank you all for all you do!
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New post 20 Oct 2017, 10:59
bb wrote:
Thank you to Hussain15 for pointing out a huge typo I made - I have updated the PDF.
Shooting for perfection :)

P.S. Thank you to Dreamy for help as well.



thanks so much. I am having trouble with understanding the method in slide 62, the one with the advanced method for finding the number of all possible
factors. can you explain it please? thanks!!
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Re: GMAT Flashcards [#permalink]

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New post 20 Oct 2017, 11:02
ayas7 wrote:
bb wrote:
Thank you to Hussain15 for pointing out a huge typo I made - I have updated the PDF.
Shooting for perfection :)

P.S. Thank you to Dreamy for help as well.



thanks so much. I am having trouble with understanding the method in slide 62, the one with the advanced method for finding the number of all possible
factors. can you explain it please? thanks!!



You may get better luck/success if you actually paste the contents or take a screenshot if it has formulas/other items that you can't easily copy.
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GMAT Flashcards [#permalink]

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New post 20 Oct 2017, 11:06
bb wrote:
ayas7 wrote:
bb wrote:
Thank you to Hussain15 for pointing out a huge typo I made - I have updated the PDF.
Shooting for perfection :)

P.S. Thank you to Dreamy for help as well.



thanks so much. I am having trouble with understanding the method in slide 62, the one with the advanced method for finding the number of all possible
factors. can you explain it please? thanks!!



You may get better luck/success if you actually paste the contents or take a screenshot if it has formulas/other items that you can't easily copy.


yes of course, thank you.

 Advanced method for finding the number of all possible
factors:
 Write out each prime factor and their power, for
example, 12 can be written as follows:
 2^2
 3^1
 5^0 etc (all other primes will have a zero power)
 Add 1 to all powers and multiply them: (in this case 6)
and that’s the number of factors (1, 2, 3, 4, 6, 12)
 Prime Factors of 462 = 2^1, 3^1, 7^1, 11^1
 Total number of factors: 2x2x2x2 = 2^4= 16
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Here are a few resources to help you with finding/explaining how to find the number of factors of a number.

https://www.mathsisfun.com/numbers/fact ... -tool.html
http://www.gmathacks.com/gmat-math/numb ... teger.html
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Re: GMAT Flashcards [#permalink]

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New post 25 Oct 2017, 00:27
Great Work! This will help me significantly with my prep :)
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New post 05 Dec 2017, 11:38
Is the only way I can have access to all flashcards broken down into topics on the app is to buy the full version of the app correct?
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New post 10 Jan 2018, 14:57
Could someone please elaborate on why 2x-6+sqrt(2-x) is not the answer in addition to sqrt(2-x)?

This is on page 28.

Am i a missing something?

Thank you.
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GMAT Flashcards [#permalink]

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New post 10 Jan 2018, 15:09
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dimson wrote:
Could someone please elaborate on why 2x-6+sqrt(2-x) is not the answer in addition to sqrt(2-x)?

This is on page 28.

Am i a missing something?

Thank you.



Thanks for posting. This question happens to be a GMAT Club Tests question, so it is a bit tricky and has a few concepts wrapped in a seemingly simple question. You can find a long discussion explaining each step here:
https://gmatclub.com/forum/m08-183787.html
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bb thanks a bunch! I was looking for this discussion.

As a side note, just wanted to add a small comment. On my recent GMAT, i had to make an actual calculation of the STDEV. However, the STDEV formula was provided. - I didn't expect this concept to be tested and got quite nervous despite the fact that question, given my finance background, was not very hard. Thus, i believe sooner or later GMAC will start to explicitly test this concept.
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Re: GMAT Flashcards [#permalink]

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New post 10 Jan 2018, 16:05
dimson wrote:
bb thanks a bunch! I was looking for this discussion.

As a side note, just wanted to add a small comment. On my recent GMAT, i had to make an actual calculation of the STDEV. However, the STDEV formula was provided. - I didn't expect this concept to be tested and got quite nervous despite the fact that question, given my finance background, was not very hard. Thus, i believe sooner or later GMAC will start to explicitly test this concept.



Thanks for the feedback from the trenches!
They have been mulling over the DTDEV for a while. They have not asked to memorize the formula but they do ask you to understand the relationship of the STDEV and Members in the set, as well as mean, mode, median, etc but these questions are rare.
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Re: GMAT Flashcards [#permalink]

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New post 10 Jan 2018, 18:19
Great resource, thanks for putting this together. The app is also very easy to use - would recommend!
Re: GMAT Flashcards   [#permalink] 10 Jan 2018, 18:19

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