It is currently 17 Oct 2017, 17:53

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Overview of GMAT Math Question Types and Patterns on the GMAT

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Intern
Intern
avatar
Joined: 14 Mar 2014
Posts: 21

Kudos [?]: 1 [0], given: 41

Schools: HBS '17
GMAT ToolKit User Reviews Badge
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 27 May 2016, 01:53
chetan2u wrote:
ruhibhatia wrote:
MathRevolution , can you please explain the solution of the below question.

When both positive integers a and b are divided by 7, both have a remainder of 4. What is the remainder when ab3 is divided by 7?
A. 6
B. 5
C. 4
D. 3
E. 2

Can we assume that a and b and single digit integers, since abc3 is a three-digit integer?


Hi ruhi,
there are two things which ab3 can mean..a three digit number or a*b*3..
1)if ab3 is three digit number, as you have said a and b should be a single digits..
so a and b have to be 4, as the next number to leave a remainder of 4 would be 11, which is not a single digit number..
so our number is 443.. and remainder when 443 is divided by 7 is 6..
2)if ab3 actually meant a*b*3...
remainder will be 4*4*3=48..
48 when divided by 7 leaves a remainder 6..

Hope it helps u


hi Chetan

one correction:>> 443/7 will give remainder 2. but i agree with what you say... it should be clear whether ab3 is 3 digit number or a product.

Thanks :)

Kudos [?]: 1 [0], given: 41

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 30 May 2016, 19:59
One of common questions is the distance between two absolute values.
On the number line m, s, t are there. If t and m are positive, is m=t?
1) |t-s|=|m-s|
2) s<0
Answer: C
There are 3 variables (m,s and t) in the original condition. In order to match the number of equations and the number of variables, we need 3 equations. Hence, there is high chance that E is the correct answer. Using both the condition 1) and the condition 2), we get a diagram like below.
The answer is always yes, and the conditions are sufficient. Hence, the correct answer is C.
Attachments

1.png
1.png [ 6.69 KiB | Viewed 1274 times ]


_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 05 Jun 2016, 06:19
Also, there are speed questions that include the concept that the same time passed for the subjects in the test.
Tom and John traveled in the same direction along the equal route at their constant speed rates of 15 km per hour and 10 km per hour, respectively. After 15 minutes Tom passed John, Tom reaches a certain Gas station, how many minutes it takes John to reach the station?
A. 5 min B. 6 min C. 7 and 1/2 min D. 8 min E. 10 min
Answer: C
Since the question states “after 15 minutes”, Tom traveled 15/4km in 15 minutes. John traveled 10/4km in 15 minutes. Hence, John needs to travel (15/4)-(10/4)km=5/4km more. The speed of John is 10km per an hour and 1 km per 6 minutes. Hence, in order to travel 5/4km, it takes him about 6(5/4) minutes more. Then, 6(5/4)=15/2 minutes. Hence, the correct answer is C.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 07 Jun 2016, 18:58
There are many “relationship” question involving statistics.
(ex 4) Last year what is the median rainfall per month?
1) Last year each of the first 6 months has 8,000 as its monthly rainfall
2) Last year the greatest rainfall is 9,000
Answer: E
Since mean, median and range do not have relationships to each other, you can generally think E as the correct answer.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 10 Jun 2016, 23:20
Below is a very common percentage question.
If $1,500 is increased by 1,300 percent, the result is what?
A. $18,000 B. $19,500 C. $21,000 D. $22,500 E. $24,000
Answer: C
You can solve this question by IVY Approach. Increased by: +, Percentage: 1/100… Then, 1,500+1,300(1/100)(1,500)=14(1,500)=2,100. Hence, the correct answer is C.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 13 Jun 2016, 01:21
Below is a geometry question.
If AB=5, BD=3, BC=7 and AD⊥BC, AC=?
A. 8√2 B. 6√2 C. 4√2 D. 8√3 E. 6√3
Answer: C

According to Pythagorean theory, A=4 and DC=4. Then, AC=4√2. The answer is C.
Attachments

11.png
11.png [ 7.95 KiB | Viewed 1180 times ]


_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 16 Jun 2016, 20:45
Please remember that questionsnowadays contain characteristics of our daily lives. It is important that non-American students to somewhat get used to or have general understanding of the culture of the United States.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 20 Jun 2016, 17:59
As said above, we have categorized some questions as dead or live questions. This means that there are some questions used in previous tests are being reused in today's test unlike others. It will certainly help to practice old types of questions.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Intern
Intern
avatar
Joined: 06 Mar 2015
Posts: 29

Kudos [?]: 5 [0], given: 176

Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 25 Jun 2016, 07:52
[*]Example 2:
40 percent of the ducks included in a certain side effects study were male. If some of the ducks had side effects during the study and 30 percent of the ducks who had side effects were male, what was the ratio of the side effect rate for the male ducks to the side effect rate for the female ducks?
A. 1/4
B. 9/14
C. 2/3
D. 7/8
E. 8/7

[Reveal] Spoiler: Answer
Answer: B
[Side effect rate for ducks of a certain sex = (number of ducks of that sex which had side effects) / (total number of ducks of that sex)]
[/list]

Hi,

I don't seem to understand how you have derived side effect rate for ducks?

The problem says there are 40% male ducks and 60% female ducks in the side effects study.
It further states some of the ducks had side effects - ......... (It does not mention how many have side effects or any % of the side effect rate)
Further states that 30% of the ducks who had side effects are male. Hence 70% of ducks that had side effects are female.

But we don't have the No of ducks who have side effects or the % of ducks who have side effects.
Hence how can we calculate "the ratio of the side effect rate for the male ducks to the side effect rate for the female ducks?"

For example if i presume that the % of ducks that were effected were 40%, the i can say that 30% of these were male and hence male ducks effected are 12%.
Then i can go ahead and calculate side effect rate as follows - 12/40*60 = 18
Calculate same ways for female and then that should give me the ratio.

Can you confirm where i am wrong, if i am?

Kudos [?]: 5 [0], given: 176

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 28 Jun 2016, 18:44
In a certain company, the manager gave 3 employees an off-day from Mon to Fri. If all 3 employees cannot have the off-day at the same time, how many possible cases are there?
A. 80 B. 100 C. 108 D. 112 E. 120
Answer: E

This is one of 50-51 level questions and also a key question. From 5*5*5-5=120, we can see the correct answer is E.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 03 Jul 2016, 06:01
In a certain company, 38% of female employees are managers and 25% of male employees are managers. What percent of all the employees in the company are females?
1) 30% of all the employees in the company are managers
2) The total number of all the employees in the company is 500
manager NOT manager
Females
Males

In case of 2-by-2 questions, if there are three %, that condition is sufficient (only if the question is in %).
Hence, the con 1) is % and it is sufficient. Thus, the correct answer is A and it is one of the most challenging 50-51 level questions.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 05 Jul 2016, 21:22
Below question is related to common mistake type 4(B)
(integer) If x, y are positive integers, is xy a multiple of 5?
1) x is a multiple of 5
2) y is a multiple of 5

Since 1)=2), xy=always a multiple of 5. The answer is yes and the conditions are sufficient. The correct answer is D.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 08 Jul 2016, 21:54
A geometry question is a difficual question as well
If n is positive integer, is n a square of integer?
1) √n is a square of an integer
2) n3 is a square of an integer
From the original condition, there is 1 variable. Hence, there is a high chance that D is the correct answer. Using common mistake type 4(B), we get D as the correct answer.
Answer: D
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 11 Jul 2016, 00:56
As always, there are questions that is combined with the common mistake type 3 and 4. Let’s take a look at a question below. This is a 50-51 level question and is a question that involves the common mistake type 4(A). You need to be strong at these questions and have to know the relationship between the Variable Approach method and the Common Mistake Types.
If m and m are integers, is m+n an odd?
1) mn=even
2) m-n=odd
Both C and B can be an answer in this case. And it is a 50-51 level question. If con 2) is m-n=odd, from (m,n)=(even,odd) or (odd,even), the answer is always yes and the condition is sufficient. Thus, the correct answer is B.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 12 Jul 2016, 19:09
It is a 50-51 level question and is related to common mistake type 4(A)
If r and x are integers, is rx a multiple of 5?
1) r=0
2) r+x is a multiple of 5
From r=0, since 0 is a multiple of any numbers. The answer is yes and the condition is sufficient. Hence, the correct answer is A.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 18 Jul 2016, 04:31
There are 72 employees that work in department A, B, C, D. If each department has at least 17 employees, how many employees work in department B?
1) The department with the most employees has 20 employees.
2) Department C has 3 more employees than department B.
This is a common mistake type 4(B) question, in which both C and B can be answers.
The answer is B in this case.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Senior Manager
Senior Manager
User avatar
Joined: 31 Mar 2016
Posts: 406

Kudos [?]: 78 [0], given: 197

Location: India
Concentration: Operations, Finance
GMAT 1: 670 Q48 V34
GPA: 3.8
WE: Operations (Commercial Banking)
GMAT ToolKit User Premium Member
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 21 Jul 2016, 09:39
MathRevolution,
.
I had read in certain external forums that people from a certain demography memorize as many quant problems they can and their sole intent is to do this when writing the GMAT and they return with most of the questions memorized. Is that how you declare that these are the questions or type of questions you see on GMAT?
.
Your threads leads me to think as if you know what will and will not be tested on GMAT whereas the threads by test takers suggest otherwise. Can you clarify?

Kudos [?]: 78 [0], given: 197

Expert Post
1 KUDOS received
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [1], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 24 Jul 2016, 02:56
1
This post received
KUDOS
Expert's post
A certain set contains 19. Is the range of them greater than 20?
1) The maximum of the set is 40
2) The set contains 25
Both C and A can be an answer here. However, if we apply the common mistake type 4(A), the correct answer is A.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [1], given: 0

Senior Manager
Senior Manager
User avatar
Joined: 31 Mar 2016
Posts: 406

Kudos [?]: 78 [0], given: 197

Location: India
Concentration: Operations, Finance
GMAT 1: 670 Q48 V34
GPA: 3.8
WE: Operations (Commercial Banking)
GMAT ToolKit User Premium Member
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 24 Jul 2016, 03:45
Good question. Are these from the recent GMAT administrations or practice sets created by you?

Kudos [?]: 78 [0], given: 197

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4120

Kudos [?]: 2885 [0], given: 0

GPA: 3.82
Premium Member CAT Tests
Re: Overview of GMAT Math Question Types and Patterns on the GMAT [#permalink]

Show Tags

New post 25 Jul 2016, 19:45
This is a very touch 50-51 level question.
Is x^3(y)<0?
1) x^5(y)<0
2) x^2(y)<0
Answer: A
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 2885 [0], given: 0

Re: Overview of GMAT Math Question Types and Patterns on the GMAT   [#permalink] 25 Jul 2016, 19:45

Go to page   Previous    1   2   3   4   5   6   7   8   9   10    Next  [ 194 posts ] 

Display posts from previous: Sort by

Overview of GMAT Math Question Types and Patterns on the GMAT

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.