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# GMAT Flashcards

Author Message
Founder
Joined: 04 Dec 2002
Posts: 16508
Location: United States (WA)
GMAT 1: 750 Q49 V42

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20 Oct 2017, 10:02
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.
_________________

Founder of GMAT Club

Just starting out with GMAT? Start here... or use our Daily Study Plan

Co-author of the GMAT Club tests

Intern
Joined: 29 Sep 2017
Posts: 6

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20 Oct 2017, 10:06
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
Founder
Joined: 04 Dec 2002
Posts: 16508
Location: United States (WA)
GMAT 1: 750 Q49 V42

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20 Oct 2017, 10:13
1
KUDOS
Expert's post
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
_________________

Founder of GMAT Club

Just starting out with GMAT? Start here... or use our Daily Study Plan

Co-author of the GMAT Club tests

Intern
Joined: 07 Jun 2017
Posts: 7

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24 Oct 2017, 23:27
Great Work! This will help me significantly with my prep
_________________

Intern
Joined: 06 Oct 2017
Posts: 7
Location: United States (CA)
Schools: Wharton '19
GMAT 1: 630 Q50 V50
GPA: 3.17

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05 Dec 2017, 10:38
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?
Intern
Joined: 03 Dec 2016
Posts: 16
Location: United States
Concentration: Strategy, Finance
GPA: 3.97

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10 Jan 2018, 13:57

This is on page 28.

Am i a missing something?

Thank you.
Attachments

Screen Shot 2018-01-10 at 4.54.36 PM.png [ 135.9 KiB | Viewed 274 times ]

Founder
Joined: 04 Dec 2002
Posts: 16508
Location: United States (WA)
GMAT 1: 750 Q49 V42

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10 Jan 2018, 14:09
1
KUDOS
Expert's post
dimson wrote:

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
_________________

Founder of GMAT Club

Just starting out with GMAT? Start here... or use our Daily Study Plan

Co-author of the GMAT Club tests

Intern
Joined: 03 Dec 2016
Posts: 16
Location: United States
Concentration: Strategy, Finance
GPA: 3.97

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10 Jan 2018, 14:36
1
KUDOS
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.
Founder
Joined: 04 Dec 2002
Posts: 16508
Location: United States (WA)
GMAT 1: 750 Q49 V42

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10 Jan 2018, 15:05
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.
_________________

Founder of GMAT Club

Just starting out with GMAT? Start here... or use our Daily Study Plan

Co-author of the GMAT Club tests

Intern
Joined: 19 Jan 2017
Posts: 8

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10 Jan 2018, 17:19
Great resource, thanks for putting this together. The app is also very easy to use - would recommend!
Re: GMAT Flashcards   [#permalink] 10 Jan 2018, 17:19

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# GMAT Flashcards

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