This thread is dedicated for discussing the GMAT concepts. We shall be elucidating one concept, leave a handful of problems to solve, and come back to post explanations and resolve queries! Gradually, we shall have a rich repertoire!
Dear Friends,
Back in 2007, I used to run a quant thread- Conecpts...Total Fundas!! In a matter of months, the thread attracted a million views. We were a large family of puys and I made many friends.
As I left for my MBA, established my enterprise, PagalGuy was missed. I knew I will be back but I never knew that it will take so long!
Nonetheless, I am back. And I am back with the same motivation- to take my concepts to a larger audience. Back in 2007, I was a CAT's Quant Nazi. Now, I love the GMAT and the MBA applications process (have been breathing these over the last 10 years).
I hope that my concepts will help the students and the community. Here is the concept of the thread...
- I shall be posting a concept (generally explained over a video) together with a set of problems, based on the concept.
- I will be covering all the four sections of GMAT. The emphasis will be on concepts that students generally struggle with or the concepts that have not been covered comprehensively in the standard books (but are tested on GMAT.
- While I shall give adequate speed, tricks, and shortcuts, the emphasis shall be on hardcore concepts- only they can get you a high score. Hence, expect some old school, hardcore, concepts-driven approach!
- I encourage the students on the thread to participate and solve these questions (these shall generally be original questions, freshly baked for you). Reply with your set of answers.
- I shall return to give the correct answers/explanations. I'll be happy to solve any queries.
- I encourage other experts and aspirants on the forum to bring up their concepts.
Gradually, we shall develop a rich repertoire of all GMAT concepts. A resource that shall continue to help the GMAT aspirants in the times to come.
All the best puys!
Regards,
Maxximus!
Friends,
Here is the first concept:
1. Inequations on GMAT
The topic is vast and I will be covering it in ~4 parts. Today's concept is on...
1.1 Factorization Based Inequations Questions
The following video (~8 minutes) shall explain the concept in great detail. Please watch the video carefully and solve the problems in it.
https://www.youtube.com/watch?v=zakbpprsj7s&t=11s
Once done, please solve the following, five questions. I shall need five answers (say, BCEAD) from every participant.
-----------------------
1. If (3x^2) > 2x, which of the following specifies all the possible values of x?
A. x < 0
B. x > 2/3
C. x > 3/2
D. 0 < x < 2/3
E. x < 0 and x > 2/3
2. If x^2 + 6x > 27, which of the following specifies all the possible values of x?
A. x > 3
B. x < -9
C. -9 < x < 3
D. x > 3 and x < -9
E. x > 9 and x < -3
3. If [(x^2 + 7x – 30) / x] ≥ 0, which of the following specifies all the possible values of x?
A. x ≥ 3
B. x ≥ -10
C. -10 ≤ x < 0
D. x ≥ 3 and -10 ≤ x ≤ 0
E. x ≥ 3 and -10 ≤ x < 0
4. How many of the integers that satisfy the inequality [(x-1)(x+2)(x+3)] ≤ 0 are greater than -5?
A. 4
B. 5
C. 6
D. 7
E. More than 7
5. How many of the integers that satisfy the inequality [(x-7)(x+2)(x+6) / x(x+4)] ≥ 0 are less than 10?
A.5
B.7
C.9
D.11
E.More than 11
-----------------------
Hope this helps, guys. All the best!
Regards,
Maxximus!
Hi Maxximus...Really helpful thread!
My answers are
Hello Maxximus!
Appreciate your effort!
I submit my answers as ECEAD.
Hi Anindita, Annie,
Welcome to the thread. I will be posting the explanations in a few hours.
Regards,
Maxximus
Hello Friends,
The correct choice of answers is EDECB.
Unfortunately, nobody got all questions correct. Please view the detailed explanations in the following video:
https://www.youtube.com/watch?v=ynnQmwyCvOk
Hope this helps.
Next concept, coming up in a few hours.
All the best!
Maxximus!
Friends,
Here is the next concept:
1.2 Modulus Based Inequations Questions
The following video (~8 minutes) shall explain the concept in great detail. Please watch the video carefully and solve the problems in it.
[highlight]https://youtu.be/OO6cSBpNDhg[/highlight]
Once done, please solve the following, five questions. I shall need five answers (say, BCEAD) from every participant.
-----------------------
If a = |b|, which of the following must be true?
I. |a| = b
II. a2 = b2
III. a3 = b3
A. I only
B. II only
C. III only
D. I and II only
E. II and III only
2. If |10-3x| < 4, which of the following represents the correct range of values of x?
A. -14/3 < x < -2
B. -14/3 < x < 2
C. 2 < x < 14/3
D. x > 2 or x < 14/3
E. x < 2 or x > 14/3
3. If |x+1| > 2x-1, which of the following represents the correct range of values of x?
A. x < 0
B. x < 2
C. -2 < x < 0
D. -1 < x < 2
E. 0 < x < 2
4. If |3-x| < x+5, which of the following may be true about x?
I. x > -1
II. x < 2
III. x < -2
A. I only
B. II only
C. I and II only
D. I and III only
E. I, II, and III
5. Is x > 1?
1) |2x+5| = 2 - x
2) |x - 12| = 12 - 3x
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
-----------------------
Hope this helps, guys. All the best!
Regards,
Maxximus!
Friends,
The correct set of answers for those five questions is- BCBCA.
Please find detailed explanations on the following link:
https://youtu.be/slSogS7Fv8s
Regards,
Maxximus
Friends,
Here is the next concept:
Frequently used vocablary on GMAT's bodfaced critical reasoning questions.
https://www.youtube.com/watch?v=PX_FUuz3ZDA
All the best!
Dear All,
Here is today's verbal concept:
"Like" Versus "As" on GMAT
https://www.youtube.com/watch?v=-RDBnJBNtyk
All the best!
Experts' Global
Hello Friends,
Here is today's quant concept:
Classification of Numbers on GMAT:
https://www.youtube.com/watch?v=-Dmxf9lI0xE
All the best!
Experts' Global
Hello Everyone,
Here is today’s verbal concept:
"Comparative" Versus "Superlative" Form on GMAT
https://www.youtube.com/watch?v=1oE1vyiJFUw
All the best!
Experts Global
Dear All,
Here is today’s quant concept:
Finding Units Digit of a Huge Multiplication
https://www.youtube.com/watch?v=KQZIEh9aVzk
All the best!
Experts Global
Hello Friends,
Here is today’s quant concept:
Finding the Highest Power in a Factorial on GMAT
https://www.youtube.com/watch?v=sOxUsay9qMo
All the best!
Experts Global
Hello Everyone,
Here is today’s verbal concept:
Extra Information Between two Commas
https://www.youtube.com/watch?v=LdcgAqmg7bU
All the best!
Experts Global
Hi Everyone,
Here is today’s verbal concept:
Which, Who, Whose, Where on GMAT
https://www.youtube.com/watch?v=e0M_MYzDfMk
All the best!
Experts Global
Dear All,
Here is today’s quant concept:
Terminating Fractions
https://www.youtube.com/watch?v=EX4eJ3WcGMI
All the best!
Experts Global
Dear All,
Here is today’s verbal concept:
"Which" Versus "That" on GMAT
https://www.youtube.com/watch?v=F61rK86ND44
All the best!
Experts Global