Last visit was: 12 Dec 2024, 02:36 It is currently 12 Dec 2024, 02:36
Close
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Close
Request Expert Reply
Confirm Cancel
User avatar
EMPOWERgmatRichC
User avatar
GMAT Club Legend
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,807
Own Kudos:
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,807
Kudos: 12,056
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
EMPOWERgmatRichC
User avatar
GMAT Club Legend
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,807
Own Kudos:
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,807
Kudos: 12,056
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
EMPOWERgmatRichC
User avatar
GMAT Club Legend
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,807
Own Kudos:
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,807
Kudos: 12,056
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
EMPOWERgmatRichC
User avatar
GMAT Club Legend
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,807
Own Kudos:
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,807
Kudos: 12,056
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Learning to Solve Quant Questions in More than Just One Way (part 1)

The Quant section of the GMAT is NOT a ‘math test’ – it’s a ‘critical thinking test’ that uses math as the subject through which you can prove your critical thinking skills. While the Quant section does require that you complete lots of basic calculations as you work through the section, the GMAT will NEVER require that you complete complex calculations to get to the correct answer… so if you CHOOSE to approach questions in that way, then you will likely limit how high you can score. If one of your goals is a Q51, then you would find it really helpful to build up a multitude of Quant skills, instead of focusing on complex, long-winded ‘math approaches’ that often take longer to implement than other more-strategic options and increase the chances of you making little mistakes along the way.

The GMAC Official Guide is a fantastic book of practice questions – and if you don’t have a copy, then you should absolutely purchase one for your studies.

Consider the following question that appears in the Diagnostic Test of the GMAC Official Guide. It’s question #8 in the Problem Solving section of the Diagnostic – and has appeared in the last several versions of that book:

If a certain toy store’s revenue in November was 2/5 of its revenue in December and its revenue in January was ¼ of it’s revenue in November, then the store’s revenue in December was how many times the average (arithmetic mean) of its revenues in November and January?

1/4
1/2
2/3
2
4

This is a fairly mid-level prompt; it’s a little wordy but the ‘math’ behind it isn’t too difficult. How would you approach it? Would you use algebra? Do you recognize that there are at least two OTHER ways to get to the correct answer (and one of those approaches requires almost no math…)?

Take a moment to answer this question in whatever way you choose. Write everything down and – in the next post - we’ll compare your approach to the three options that I’ve hinted at.

GMAT Assassins aren’t born, they’re made,
Rich

If you have any questions about anything in this thread, then you can feel free to contact me directly via email or PM.
User avatar
EMPOWERgmatRichC
User avatar
GMAT Club Legend
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,807
Own Kudos:
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,807
Kudos: 12,056
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Learning to Solve Quant Questions in More than Just One Way (3 approaches)

In the prior post, I hinted that there were (at least) 3 different approaches to solving the included OG Diagnostic question. Here they are:

1st Approach: Algebra

The explanations provided in the Official Guide often focus on the ‘math approach’ as that is that standard approach taken in most math books. However, that type of approach is often step-heavy and arguably takes the longest to complete.

For this prompt, we can create 3 variables:

N = revenue in November
D = revenue in December
J = revenue in January

With the information in the first half of the prompt, we can create two equations:

N = (2/5)(D)
J = (1/4)(N)

We’re then asked to calculate (D) / [(N+J)/2]

With the given equations, we can translate each variable ‘in terms of’ D and plug in… Again, this is tedious, step-heavy work, but you can view it in the Official Guide if you like.

2nd Approach: TESTing VALUES

Many questions in the Quant section can be solved with a Tactical approach (and part of your training should focus on learning those approaches and when certain Tactics are applicable). Here, we are given no actual values to work with, so we can choose our own.

Based on the fractions involved, the common denominator would be 20, so let’s start with D = 20…

IF….
D = 20 then
N = (2/5)(D) = 8
J = (1/4)(N) = 2

Now, we just have to place D = 20, N = 8 and J = 2 into the question….

(20) / [(8 + 2)/2] = (20) / (5) = 4

This is the answer to the question - and you’ll get that same result regardless of the values that you choose to TEST (as long as your numbers ‘fit’ the given equations). This approach has the benefit of being fast and easy (consider the work involved - we’re really just adding and multiplying small numbers together). With fewer steps, you’re also less likely to make a little mistake along the way.

3rd Approach: Logic (and using the ‘spread’ of the answers to your advantage)

Certain questions in the Quant section are designed with really fast ‘concept shortcuts’ in mind. This is done on purpose to reward strong critical thinkers. Business Schools are looking for EXACTLY that type of critical-thinking applicant, but the GMAT has no way to give you extra points for ‘being clever’ – it can only provide you with potential shortcuts that will save you time and decrease whatever pacing-related anxiety that you might have. As a result of finding these shortcuts, your chances of scoring higher should increase, since you’ll have more time to answer the remaining questions than someone who is using lengthy math approaches and losing time as a result.

Here, consider how the given monthly revenues relate to one another….

1 - November’s revenue is 2/5 of December’s revenue. This means that the December revenue is MORE THAN DOUBLE November’s revenue.

2 – January’s revenue is ¼ of November’s revenue. Since January’s revenue is so much smaller than November’s revenue – and we already know that December’s revenue is MORE THAN DOUBLE November’s revenue, then this means that December’s revenue is a LOT greater (FAR MORE than double) than January’s revenue.

We’re asked to compare December’s revenue to the AVERAGE of November’s and January’s…. Averaging those two smaller numbers will lead to a result that is SMALLER than November's. By extension December’s revenue will be far GREATER than double than average. Looking at the answer choices, there’s only one answer that fits that description…. 4.

Now, consider how much actual work went into the 2nd and 3rd approaches to this prompt (especially relative to the work that went into the 1st approach). Assuming that you had an equal ability to tackle this question using all 3 approaches, which one would be fastest and easiest to implement? If you’re training to be a 760+ Assassin, then you know that it’s NOT the 1st approach.

GMAT Assassins aren’t born, they’re made,
Rich

If you have any questions about anything in this thread, then you can feel free to contact me directly via email or PM.
User avatar
EMPOWERgmatRichC
User avatar
GMAT Club Legend
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,807
Own Kudos:
12,056
 [1]
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,807
Kudos: 12,056
 [1]
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
The Top 10 EMPOWERgmat GMATClub Success Stories of 2017

The beginning of the new year rarely allow GMATers to rest for too long, as looming Round 2 and Round 3 application deadlines are on everyone’s minds. With the Round 2 deadlines now essentially complete for this application cycle, the Team at EMPOWERgmat took time to reflect on the various successes of our Clients. Here is a Top 10 list of stories, from GMATClub Members who raised their scores using EMPOWERgmat:

“Four years to 760 – my journey” – by souvik101990

https://gmatclub.com/forum/four-years-t ... mpowergmat

“Top 5 Schools are NEXT on my to do list! 750 (q 51, v 42)!!! - by CJRJr

https://gmatclub.com/forum/top-5-school ... t#p1916871

“530 to 730 (a50, v38) GMAT DONE! Anyone Can Do It!!! – by Talanc

https://gmatclub.com/forum/530-to-730-q ... t#p1836074

“Guess I can finally write one of these” – by AvalonQQ

https://gmatclub.com/forum/guess-i-can- ... t#p1827365

“How I went from v32 to v42 in one month (total score 740, Q49V42)" – by oneteam

https://gmatclub.com/forum/how-i-went-f ... t#p1797142

“Long Detailed Debrief – 630 to 740 (Q48, V45)" – by Tadilliner

https://gmatclub.com/forum/long-detaile ... t#p1886728

“620 Diagnostic to 690 and finally 750 debrief” – by mtnginger

https://gmatclub.com/forum/620-diagnost ... t#p1884629

“From 620 to 670, from 670 to 730” - by Vanmotan

https://gmatclub.com/forum/from-620-to- ... t#p1847070

“Non-Native Speaker – 6-month journey from 530 to 690 with 94% Verbal” – by indogmat

https://gmatclub.com/forum/non-native-s ... t#p1795215

"720 in 2 months, 41V 47Q, EMPOWERgmat Prep" - by jackapartain

https://gmatclub.com/forum/720-in-2-mon ... 52985.html

To all those beginning their studies this year, or looking to improve on their existing scores, may 2018 be a banner year for GMAT Assassins everywhere!

GMAT assassins aren’t born, they’re made,
Rich
User avatar
tanvi98
Joined: 03 Feb 2020
Last visit: 19 Oct 2023
Posts: 3
Own Kudos:
Given Kudos: 2
Posts: 3
Kudos: 1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
dear EMPOWERgmatRichC,

I have been using the EmpowerGMAT 1 month plan for a week now (have finished all the sections under 1.0 except taking the CAT2) , and I have been consistently scoring between 70-85% on average on all the quizzes for verbal and quant so far. How do you think I'm doing? And is the score on these quizzes indicative of my performance on the actual test?
User avatar
EMPOWERgmatRichC
User avatar
GMAT Club Legend
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,807
Own Kudos:
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,807
Kudos: 12,056
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hi tanvi98,

I've sent you a PM; we should continue our conversation there (instead of having it in this series of blog posts).

GMAT assassins aren't born, they're made,
Rich
User avatar
Kritisood
Joined: 21 Feb 2017
Last visit: 19 Jul 2023
Posts: 501
Own Kudos:
Given Kudos: 1,091
Location: India
GMAT 1: 700 Q47 V39
Products:
GMAT 1: 700 Q47 V39
Posts: 501
Kudos: 1,148
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hi EMPOWERgmatRichC
would you also have an excel with the changes in the 2020 wrt the 2019 guide? As in all new questions in 2020 in comparison with 2019? and the same for 2017 in comparison with 2020? Would really help, thanks :)
User avatar
bb
User avatar
Founder
Joined: 04 Dec 2002
Last visit: 11 Dec 2024
Posts: 39,357
Own Kudos:
Given Kudos: 21,578
Location: United States (WA)
GMAT 1: 750 Q49 V42
GPA: 3
Products:
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
GMAT 1: 750 Q49 V42
Posts: 39,357
Kudos: 76,702
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Yes. They do. Find the directory topic for OG 2020 or search for it.

Posted from my mobile device
User avatar
Kritisood
Joined: 21 Feb 2017
Last visit: 19 Jul 2023
Posts: 501
Own Kudos:
Given Kudos: 1,091
Location: India
GMAT 1: 700 Q47 V39
Products:
GMAT 1: 700 Q47 V39
Posts: 501
Kudos: 1,148
Kudos
Add Kudos
Bookmarks
Bookmark this Post
bb
Yes. They do. Find the directory topic for OG 2020 or search for it.

Posted from my mobile device

Thanks :) found this online too (link of the new quant questions in 2020 OG):
https://e-gmat.com/blogs/gmat-og-2020-q ... solutions/
   1   2   3   4   5   6   7