Guestbook
Just a quick note to say thanks for posting your solutions (for free!) to the OG 13th edition questions. Seeing you work through the questions has been very helpful, especially for the questions which have poor/confusing 'official' answers in the OG!
David M
Prior to the GMAT I had ZERO Quantitative background, and avoided math in college like the plague. Dabral's course took my Quant from a diagnostic of 17 all the way up to a 43 on exam day. A lifetime of math learned in just a few months. I also got into 2 out of 3 top 10 MBA programs to which I applied. At this point, I'm scheduling a re-take moreso for pride and to show a more balanced score during interviews-I'm confident I can reach 46/47 w/ these videos. If you're looking for a structured, strategic, step-by-step approach to the GMAT that covers every relevant topic in depth, then you won't find anything better than GMAT QUANTUM.
James Davermann
Dabral's Quantum GMAT covers broad concepts and dissects specific problems. Both are essential and synthesizing - if you follow the videos with your own pad and paper you will - no doubt - improve your score and be happy with your investment. Much appreciated and recommended.
Vikas
HI Dabral!
I just want to say thank you thank you THANK YOU for all of your help on my GMAT journey.
A little about me: I started the GMAT process 2 years ago. After taking a course with Kaplan I scored a dismal 560, with a very low quant score. I felt completely defeated and abandoned my bschool aspirations for a year. After being referred to Dabral in 2012, I decided to recommit and begin to study again. The combination of GMAT Quantum online course and one-on-one tutoring from Dabral gave me the quantitative fundamentals and confidence to tackle the GMAT. I recently scored a 680 (45Q) on the GMAT and owe it all to working with Dabral.
Lauren
Email from a recent student:
"Hi Dabral,
I wanted to write you a quick note to say thank you for your course and the tutoring session. I took the GMAT this week and got a 670. Overall, I'm pleased with the score and will not re-take the test. I was hoping to hit 700, but in the end I am proud of my improvement. I went from a 590 to a 670 and I owe the improvement to you. My previous quant score was a 34- I got a 44 this time around! I'm sure with more time and practice, I would be able to break the 700 mark. Your teaching methodology and meticulous attention to detail helped me finally learn the foundations of math. While the study process wasn't fun, your course actually made it interesting and I felt a sense of satisfaction when I worked out the difficult problems quickly. Lastly, your course gave me much-needed confidence for the test day.I will definitely pass on your information to friends of mine. The Kaplan course I took 2 years ago and the Manhattan Books I bought were a waste of my resources.
Thank you again!
Shirelle"
GMATQuantum
GMAT Quantum is an excellent resource for obtaining the necessary tools to tackle the quantitative section of the GMAT. Dabral's strategic approach and thorough videos are an excellent supplement to any study regimen - if not your primary material. Dabral masterfully covers all tested concepts in a logical manner. Although his site offers an abundance of free content to clarify your understanding of practice problems from external sources, I highly recommend investing in his affordable tutorial. Although his curriculum is video based, Debral adds the human component by working closely with each and every client. He discusses each client's strengths and weaknesses in order to create a personalized plan that will result in the highest score within the proposed timeline. Dabral's videos, mastery of all things quantitative and his personalized study-plan preparation improved my overall score by 150 points. In only two months I achieved my target score solidifying a competitive candidacy at a top 5 MBA program.
Thank you again Dabral, I truly appreciate your help!
I wish you continued success,
Chalin'
Chalin'
730 (Q50)
Hi Dabral!
I am finally done with GMAT! Thank you for your guidance over the last two weeks! Your videos really sharpened my skills!
Also, thank you for the final email, which pointed out to me the relevant sections!
I am glad I watched them diligently! The triangular inequality came out, compact inequalities came out. 2 questions free !! Many others that were covered in GMAT course!
Thank you so much again, I am glad to have known you!
Reagan
GMATQuantum
Comment from student:
Your Name: Julius Bolz
Subject: Thank you for the videos
Message: Dear Dabral,
Today I finally reached my required GMAT Score to enter Business School and I used extensively your youtube videos!
Thanks so much for these videos, they have helped me tremendously.
Great effort and work,
Julius from Germany
GMATQuantum
If your quant skills are catastrophic like mine there is really no better (or more cost effective) place you can go to improve than here. I would recommend Dabral's course to anyone taking the GMAT and Dabral's tutoring to anyone who is serious about improving his or her quant score as much as is realistically possible.
I got a 560 on the first practice test I took which wasn't even an authentic test. With another prep program I managed to raise my score to a 680, again, on a non authentic test, but I hit a plateau and scored lower on the next non authentic test I took.
Luckily, in desperation I stumbled onto a link to Dabral's free videos on GMATclub (I can't find the link but I remember reading good things about him on a thread there). Anyway, with Dabral's help, I managed to improve my fundamentals and solidify a 710 on the real test.
Bare in mind that I neglected my quant skills and skipped out on every math class I ever took my entire life. I barely passed the last required class to achieve the basic math requirement for a B.A.
When I watched the first GMATQuantum video, my highest quant score was a 36 on a fake practice test. I'm hoping to do better, but, as of now, I have a 43 on the real test. That wouldn't be possible without Dabral. For someone who was scoring as abysmally as me, that seemingly modest success is huge!
I am now considering whether or not to attempt, using Dabral's website, to raise my quant score further so I can get into the 730+ overall range. I can remember when I would pray that I could ever even improve to a 700, so to be thinking of going for a 730 and to already have a 710 feels unreal!
Jacob
I strongly recommend GMAT Quantum for anyone wanting to increase their score substantially in the Math section of the GMAT. Dabral is an amazing tutor and his program is designed to tackle problems quickly and accurately. After studying with Dabral and his online program, my GMAT score increased 90 points!! Just great, definitely recommend it!
Florence
Where would I be without GMAT Quantum? I went from the low 600's to a 710 in a matter of months. My quant went from a 40 to a 48! If you are looking for gimmicks and short cuts, GMAT Quantum is not the place for you. GMAT Quantum curriculum focuses on building a strong quantitate foundation that relies on the foundational concepts that the GMAT loves to test (algebra, number theory, geometry, word problems, etc.). The curriculum is challenging and comprehensive, but will surely prepare you for the rigors of the GMAT. I give GMAT Quantum my highest reccomendation. Dabral is a not only a math genius, but also is an even better communicator/teacher of math. He breaks complex problems down into digestible, easy-to-follow pieces in order to facilitate student learning. If you are looking to take your quant score into the 48+ range and if you are willing to listen, learn, and work hard, Quantum GMAT and Dabral will help you reach your GMAT Goals! I am now so confident in my Math, I have decided to retake my GMAT because I feel that I can score a 50Q. I will keep you all posted on my progress. Best of luck with the GMAT!
Antonio
Thank you so very much for these videos! They are incredibly helpful to me - your explanations are clear and concise. Although many times I approach problems differently than you do (avoiding an algebraic approach when possible), seeing the way you tackle questions is really adding to my toolkit.
Keith
The best Investment you guys would ever make in your life. Dabral is a legend. Learning GMAT or GRE from him is like learning Tennis from Federer or boxing from Ali.
Abdul Rahman
Thank you so much for posting these videos! I just discovered your site two days before my exam, but it will still help me greatly!
Stephanie
I just wanted to thank the Gmat Quantum for all the amazing work.
This site is the most usful tool I ever came upon.
The explanations are clear, precise and very helpful.
And most of all, I am very greatful that all of the explanations can be viewed online for free.
I think that is very noble from the owner from the site.
Knowledge is for sharing.
Thanks for all the lessons!
Ivana
Contacting Dabral for my GMAT preparation was the best thing I could do for myself. I only wish I had known about him from the start of my preparation. I would have saved a lot of money that I wasted on other books as well as on a class I could have done without. Dabral's instruction is very thorough, and unlike other teaching methods, he breaks down each question, so you know what the GMAT writers are looking for and the correct method of attacking the question. I think this is over half the battle. Looking at a question, being able to understand what to do to answer it without wasting time going down other long-winded paths makes such a huge difference, and consequently is a huge time saver. In addition, Dabral teaches concepts as opposed to tricks. This way, students are prepared to tackle any question, including ones that are disguised and a little trickier. Unlike other classes, Dabral doesn't use material outside of official GMAT material, which I now realize (after spending lots of $ on other books) is the only necessary source. This makes sense because your practice should closely replicate the actual exam. Dabral also helped me craft a study plan that fit within my time frame. He instructed me on which problems to tackle, when to take practice exams, etc. I saw improvement in my quant immediately after my first session with Dabral, and his solution videos are so thorough and easy to understand. My actual GMAT score was consistent with my GMAT Prep practice exams that I took when working with Dabral. I really cannot say enough about how helpful Dabral was. He has a great demeanor and shows true interest in each person's quest to do well on the GMAT. Do not waste time working with other people/classes for your quant score. Dabral is the best.
Christine Lam

The GMAT Quantum course that Dabral has made was exceptional for suiting my needs. Thanks to his course I was able to jump from a Q46 to a Q49 in two months time. Dabral is teaching style is extremely comprehensive and he is very proficient technically - one of the best GMAT mathematicians I have dealt with. I strongly recommend every GMAT Quant aspirant to take the full course and go through all the concept videos and problems. Dabral - thank you for creating this comprehensive course, truly one of the best prep materials for the quant section in the industry.