GMAT Focus 56Hrs| Quant & Data Insights| GMAT 760 Instructor (Udemy.com)
Master GMAT Math | Score Q85+ | Problem Solving & Data Sufficiency | Complete GMAT Quant Preparation for 705+
Created by: Jackson Kailath
Last updated September 2026
What you will learn
- Master GMAT quant fundamentals with Problem Solving, Data Sufficiency and Data Insights coverage
- Score Q85+ with GMAT quantitative reasoning strategies for 705+ total score
- Learn GMAT math shortcuts - no calculator needed for quant section
- Ace GMAT Focus Edition with updated Percentages, Algebra, Probability, Geometry, Work & Rate problems
- Build structured GMAT preparation approach with 57 hours of in-depth video lessons
- Apply proven methods used by a GMAT 760 instructor to achieve top scores
- Approach GMAT questions with confidence and fall in love with math!
How it compares
Against the other 503 rated Udemy courses in Teaching & Academics on CourseDuck:
- Rating4.6 out of 5higher than 58% of them
- Reviews3,477#47 of 504 by number of reviews
- Length56.2 hourslonger than 98% of them
- Last updatedSeptember 2026more recently than 98% of them
Course Description
Looking for the best GMAT quant course to achieve a 705+ score? This comprehensive GMAT quantitative reasoning course is taught by a 760-scoring instructor with 21,000+ students. Master every GMAT math topic needed for the GMAT Focus Edition: Problem Solving, Data Sufficiency, and Data Insights. With 57 hours of structured video lessons, you'll build the mental math skills and strategic thinking required to score Q85+. Perfect for GMAT preparation targeting top MBA programs.
Our Students Share Their Experience:
It´s unbelievable the EXTRAORDINARY work that Jackson has made in the preparation of this course. I bought many other courses in udemy and other platforms that sell "get 700+, from zero to 700+, etc" but were very poor courses. But this one is Amazing, the teacher is really worried for you to understand. The best Gmat course!-Hernando Fierro
"This is a great review for anyone who is hoping to brush up on their quant skills going into the GMAT. I did my first practice exam 6 weeks before my exam date and scored a 640, with the quant section being the main area that I needed to improve on. After 12 years, I got in touch with my high school math teacher who forwarded me grade 11 and 12 textbooks, which were helpful, but honestly, just too much content to get through in a short time. I found this course on Udemy, and found it to be very helpful because it is broken out so clearly and the instructor has a very good way of explaining the concepts. There were probably only 2-3 times in the whole 40 hours where I knew that there was a faster way to solve the problems. Also, because Udemy has the function available to speed up, if you are reasonably familiar with certain sections, you can watch it at 2.0x, etc. Anyway, long story short, I got 710 on my GMAT yesterday, with a 48/51 on the quant section and purchased this course only 30 days before that. (Don't get me wrong, I put in a lot of hours in those days, but I still think that's a great result.) This plus the official practice questions and exams, and online forums for particular questions was the key to my success, but the practice questions don't give you any indication about the breadth of concepts or whether you're anywhere near being familiar with all of them. This course was critical for that - thank you very much! "-Chloe Cameron
I really liked this course, and found it very comprehensive. Jackson has meticulously designed the course structure and prudently selected the sequencing of concepts. I felt both adequately coached and intellectually challenged at various points in the course to get a very holistic learning experience overall. Would highly recommend this to anyone preparing for GMAT.-Karan Kapoor
Well Done, very helpful and the content actually motivated me- Farhan Hasan
One word which describes the instructor: Diligence. You’ll get good value for your money and even more.-Adaora Anyanti
Great course! I just went through all the concepts and am about to start working on some problem questions that I saved for later. I solved several easier problem questions and Jackson provides great explanations to guide me through how to solve better or more efficient. I am not good at math but Jackson provides great solutions step by step to make it easier to understand math. There are some sections that I don't understand how to solve questions but Jackson promptly replies to your questions. This is very important for me to understand the material thoroughly and to move forward to the next question with confidence. Overall, 5 stars both on course material and instructor's attentiveness! Highly recommend this course to everyone who is preparing for GMAT. -Yosuke Tomita
Fast paced, direct to the point and very well handled when it comes to explanations. Make maths be piece of cake.-Eduardo Prioli Novaes
Many More ! Check the review section below.
ABOUT THE COURSE:
GMAT Quantitative Reasoning and Data Insights can be mastered with the right approach!
“Even the most motivated and intelligent student will advance more quickly under the tutelage of someone who knows the best order in which to learn things, who understands and can demonstrate the proper way to perform various skills, who can provide useful feedback, and who can devise practice activities designed to overcome particular weaknesses.”
― Anders Ericsson, Peak: Secrets from the New Science of Expertise
TARGET SCORE 99%ile / 760+ GMAT
Do you have trouble getting answers to problems which you already practised ? Do you get a feeling that GMAT Math seems unending ? Are you able to retain and apply your learnings in mock tests ? Do you feel confident about what all you have learnt ?
You have come to the right place where you will be able to bring structure to your Math Prep. With this course, everyday you study for the GMAT will bring you progress and you will be adding to the reservoir of knowledge to apply on GMAT DAY!
Instead of spending hours and hours on just problem solving, FIRST focus on building rock solid fundamentals. Once you finish this course you will know all the types of questions and have interlinkages between various topics and question types in your mind. Then you will be all set to spend just sufficient time for practise. The difference will be that every question you continue to practise after this course will stick in your mind because it will just add to the reservoir of knowledge you have already built.
Get ready to achieve your DREAM Score! I scored 760 in the GMAT by approaching GMAT prep in a structured manner.
The Topics are arranged to easily form a mental structure comprising of Topics and Question types for the GMAT.
BASICS for GMAT
In this section we cover the basics including what prime numbers are, HCF & LCM, Different types of fractions, Decimal Numbers, Classification of Numbers, BODMAS rule and Exponents.
Algebra Basics for GMAT
This section is an introduction to word problems. It covers linear equations in both one variable and multiple variable scenarios. Word problems are covered throughout the course in respective sections. This section build fundamentals so that you can easily grasp new concepts in the other sections wrt word problems. Algebraic identities are also covered here. 9+ Solved Questions.
Data Sufficiency Basics
Instructor Details
- 4.6 Rating
3,477 Reviews
Jackson Kailath
Jackson is an Enterpreuner who loves to teach students and enjoys simplifying complex concepts to explain them in an easy to learn manner. He has completed his Engineering and also done MBA from the Indian School of Business. He believes that a good teacher is one who can teach a subject in a structured manner so that students can form a mind map for the topic at hand automatically.
More courses by Jackson Kailath
Data Structures and Algorithms in Python: DSA Course (2026)
4.2 (1,512 Reviews)
Provider: Udemy
Time: 57h
$74.99
Data Structures Algorithm DSA | Python+Javascript LEETCODE (2025)
4.5 (1,276 Reviews)
Provider: Udemy
Time: 41.3h
$84.99
English Vocabulary GRE | TOEFL |GMAT | CAT | IELTS (2026)
4.6 (894 Reviews)
Provider: Udemy
Time: 11.1h
$11.99
Data Structures and Algorithms in JavaScript: DSA Course (2025)
4.6 (668 Reviews)
Provider: Udemy
Time: 68h
$74.99
IELTS Band 8: IELTS Listening Mastery | IELTS Tenses (2026)
4.4 (452 Reviews)
Provider: Udemy
Time: 24.6h
$11.99
More Teaching & Academics courses
GMAT Focus | Quantitative| Master Math Course | 2026 Updated
5.0 (854 Reviews)
Provider: Udemy
Time: 55.3h
$11.99
Speed Reading MACHINE 5.1: How To Read 307 Books In 2026
4.9 (1,386 Reviews)
Provider: Udemy
Time: 7.2h
$12.99
GRE Quantitative Prep | Master Math Course | 2026 Updated
4.9 (980 Reviews)
Provider: Udemy
Time: 59h
$10.99
IELTS Pro: Reading | Writing | Listening | Speaking (2026)
4.9 (799 Reviews)
Provider: Udemy
Time: 30.4h
$10.99
Reviews
By Vaibhav Kumar on 8/31/2025
Amazing course. My GMAT exam is in 15 days. Started this course 3 days ago. Instructor is great and I personally found the course to be really comprehensive and contained with a lot of practice questions (and timed tests). Couple the course with official mocks and other coaching mocks and you're good to go. For me Data Insights is absolutely new topic with no prior experience in Data Sufficiency or other DI question types. But, I can tell you that instructor has explained all the questions very well. You wouldn't need to refer other sources for understanding concepts/question types. PS: I've prepared for CAT before so lot of Quant concepts were already familiar to me and therefore I'm able to complete this course in 4-5 days. Others would require around a month to cover each topic paired with in-depth of that topic using Official guide (or OG sectional books).
By Jon-Louis Dalton on 12/27/2023
All of the required topics are covered in detail and lots of pointers are provided. This course will help you cement your mathematical ability. The course does not prepare you for the speed at which you need to answer questions on the actual GMAT. I would recommend doing timed questions from something like Magoosh or the official GMAT mock papers.
By Madhur Bhardwaj on 11/27/2023
I wanted to express my gratitude for the fantastic learning experience this course provided. The instructor's expertise and teaching style made challenging math concepts feel accessible and manageable. The course materials were comprehensive, well-organized, and packed with useful tips and strategies. Highly recommended for anyone preparing for the GMAT!
By Vivekanandhan Thirunavukkarasu on 10/25/2023
This course is more application oriented- hence it is easy to understand the concepts from application, If there's one area of improvement- that would be to have equal time for explaining higher order reasoning and conclusions, as he is currently spending on explaining basic/primary reasoning and conclusions.
By Maxime van den Berg on 3/31/2023
It is a really helpful course as it gives you a structure to follow (especially if you are a visual learner that needs someone to explain things to you). However, if you were raised in an english system, some of the terminology used in this course does not correspond and some questions are written with some grammar errors, which will confuse you, unfortunately (examples below). Enough so that it slowed my learning noticeably. In essence, there are some language barriers that can confuse you if you are an english native speaker (E.G. we use PEMDAS (because the typical symbol used is a parentheses - not a "bracket") V.S. BODMAS - in this case it is irrelevant because it's not a tough concept, but this is just one example of many) There were also a couple questions that did not make sense -> E.G. A question in a quiz asked for how many Liters of a mixture there was in a bucket after a set of tasks were completed (actual question -> "how many liters of the mixture is there in the bucket."). This means "how many Liters of this mixture are now left after completing the tasks" if you phrase it the way the question did. The instructor then explained in the review that we were looking for how many Ls there were initially, which is not what the question states and meant I got the wrong answer in the quiz (which confused me a lot at the time and the insecurity going forward in the quiz didn't help either) Overall, it is a great course, but I would hesitate to recommend it because of the terminology differences and grammar mistakes, that made a difficult subject to learn that more challenging. Normally, this wouldn't be an issue, but because I needed to study complex topics in a short period of time, the extra confusion and insecurities gained from these misunderstandings were not worth it.
By Anil Kumar Reddy Nadiminti on 1/15/2023
All the topics are covered and explained in a detailed and simple way. I do recommend this course to whoever are preparing for their GMAT exam. This course teaches concepts and simultaneously allows us to solve concept problems, a method, which improves learning and implementation.
By Gaurav Bansal on 5/27/2021
Though there are certain areas/concepts I would say are missing , but definitely a lot many concepts and tricks which have been covered here , have not been covered in courses by others ... Icing on the cake is the pricing of the course .... a must read for those targeting high score ...
By Karan Kapoor on 1/4/2021
I really liked this course, and found it very comprehensive. Jackson has meticulously designed the course structure and prudently selected the sequencing of concepts. I felt both adequately coached and intellectually challenged at various points in the course to get a very holistic learning experience overall. Would highly recommend this to anyone preparing for GMAT.
By Chloe Cameron on 12/8/2020
This is a great review for anyone who is hoping to brush up on their quant skills going into the GMAT. I did my first practice exam 6 weeks before my exam date and scored a 640, with the quant section being the main area that I needed to improve on. After 12 years, I got in touch with my high school math teacher who forwarded me grade 11 and 12 textbooks, which were helpful, but honestly, just too much content to get through in a short time. I found this course on Udemy, and found it to be very helpful because it is broken out so clearly and the instructor has a very good way of explaining the concepts. There were probably only 2-3 times in the whole 40 hours where I knew that there was a faster way to solve the problems. Also, because Udemy has the function available to speed up, if you are reasonably familiar with certain sections, you can watch it at 2.0x, etc. Anyway, long story short, I got 710 on my GMAT yesterday, with a 48/51 on the quant section and purchased this course only 30 days before that. (Don't get me wrong, I put in a lot of hours in those days, but I still think that's a great result.) This plus the official practice questions and exams, and online forums for particular questions was the key to my success, but the practice questions don't give you any indication about the breadth of concepts or whether you're anywhere near being familiar with all of them. This course was critical for that - thank you very much!
By Yosuke Tomita on 11/1/2020
Great course! I just went through all the concepts and am about to start working on some problem questions that I saved for later. I solved several easier problem questions and Jackson provides great explanations to guide me through how to solve better or more efficient. I am not good at math but Jackson provides great solutions step by step to make it easier to understand math. There are some sections that I don't understand how to solve questions but Jackson promptly replies to your questions. This is very important for me to understand the material thoroughly and to move forward to the next question with confidence. Overall, 5 stars both on course material and instructor's attentiveness! Highly recommend this course to everyone who is preparing for GMAT.
Quality Score
No CourseDuck member has rated this course yet. Taken it? Give each part a thumbs up or down.
Overall Score : 92 / 100











