GMAT Ninja Quant Ep 1: Arithmetic

Do you find yourself frustrated after missing easy quant questions on the GMAT or Executive Assessment? Is your GMAT Quant score lower than you think you deserve? Do you struggle with fractions, decimals, or large numbers? Wish you had a more systematic and efficient approach to tackling GMAT or EA quant problems?

In this video, Harry—a GMAT Ninja tutor—will guide you through strategies to approach GMAT quant questions with confidence and precision. He’ll help you develop a clear method for avoiding unnecessary mistakes on easy questions, ensuring that simple errors don’t hold you back from achieving your best score.

This is video #1 in our series of full-length GMAT quant lessons. For updates on upcoming videos, please subscribe!

This video will cover:
➡️ Fractions, decimals, and estimation
➡️ Dealing with big numbers
➡️ Choosing the best way to solve the question
➡️ How to avoid careless mistakes

This video is for you if:
➡️ You lack efficiency or flexibility
➡️ You miss easy questions
➡️ You need to learn (or review) the basics
➡️ You “know” everything but still struggle

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Chapters:
0:00 Introduction
01:45 Q1 - Alternative methods?
08:23 Q2 - A common factor
15:05 Q3 - Reverse simplification
21:59 Q4 - A systematic process
27:57 Q5 - Dealing with large numbers
35:09 Q6 - Challenging finish

[thehappygoluckygirll.]

In 3rd question, I was doing evrything right, just by the end while calculating 120/37...I took approx 36 to make it easier and got E as answer. But the answer was D ofcourse! :(

[shreyway]

Hello. at 18:56 you times all the variables by 10, which makes sense. but in step 3, you didn't multiply 0.74 by 10, you just rewrote it as the same vale (0.74) . That looks wrong. could you clarify this?

[lesdickson]

I'm prepping for GMAT and going through these questions but I've found myself not simplifying my process for Q4 & Q5 -- it took me about 3:30-4 mins to answer both questions despite getting them right which will hold me back in the real (or mock) exams. How do I simplify my process and not rely so much on calculations?

edit: for Q6, I worked it out differently by using the actual numbers without over or underestimating either quantity or price and got around $485 but got the question as I chose E instead of B smh. I did get Q1-Q5 right though, the last one was a challenge but at least I'm starting to internalise the processes to answer such questions.

[guillaumegruyters]

I'm confused about the final question, 1, is insufficient because the answer could possibly be profitable and unprofitable. and 2. is simply just wrong? Like there is one answer, no either or?

Also in Q3, why did you only multiply 0.3 to 3 and not 0.74 to 7.4 automatically?

Thank you!

[tanyavarshney]

although i was learning and listeneing, couldnt unsee that u do have bright blue eyes

[doniaridane]

aren't we allowed to use calculators?