On December 20, 2023, Brent will stop offering office hours.

- Video Course
- Video Course Overview
- General GMAT Strategies - 7 videos (free)
- Data Sufficiency - 16 videos (free)
- Arithmetic - 38 videos
- Powers and Roots - 36 videos
- Algebra and Equation Solving - 73 videos
- Word Problems - 48 videos
- Geometry - 42 videos
- Integer Properties - 38 videos
- Statistics - 20 videos
- Counting - 27 videos
- Probability - 23 videos
- Analytical Writing Assessment - 5 videos (free)
- Reading Comprehension - 10 videos (free)
- Critical Reasoning - 38 videos
- Sentence Correction - 70 videos
- Integrated Reasoning - 17 videos

- Study Guide
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## Comment on

Multiplying by Doubling and Halving## I'm really enjoying these

## Great to hear, we are glad

Glad to hear you're enjoying them!

## Great techniques. Thank you

## Thanks for that!

Thanks for that!

## After this video, I had an

## Good to hear!

Good to hear!

## Thank you

## very cool, thanks

## Very good and simple

I liked it very much and it is very easy..

Thank you very much for explaning this technique..

## nice .. i am gaining

## are the se all videos enough

## Yes, our course covers every

Yes, our course covers every concept and strategy necessary to beat the GMAT.

## This is a great strategy!

Thanks!

## Although it has been more

## Glad to hear it!

Glad to hear it!

## Just to confirm this only

## That's correct.

That's correct.

## good video

## Alternatively, prime

## Yes, we could! That concept

Yes, we could! That concept is covered later in the course, so I didn't discuss in this video.

## These videos are such helpful

## Very easy and interesting

## Why did I never knew this

## Wish they taught math in

## Another brilliant video!!

## do you have slides for the

## We have 2 sets of flashcards

We have 2 sets of flashcards (for GMAT math and GMAT critical reasoning) that are taken from slides of the course.

They can be found here: https://www.gmatprepnow.com/content/free-content

Cheers,

Brent

## Not to sound stupid, but

## Great question! I hadn't

Great question! I hadn't thought of that.

Since a ÷ b is the same as a/b, we can apply some nice fraction rules to division.

For example 17.5 ÷ 2.5 = (17.5)/(2.5)

Notice that we can take (17.5)/(2.5) and multiply top and bottom by 2 to create an EQUIVALENT fraction 35/5, which is much easier to evaluate.

So, 17.5 ÷ 2.5 = (17.5)/(2.5) = 35/5 = 7

So, if it helps us, we can take ANY division and multiply both parts by the same value to create an easier division.

Here's a quick one: 21/5 ÷ 7/5

If we multiply both parts by 5, we get: 21 ÷ 7, which is much easier to deal with.

Cheers,

Brent

## Very helpful. Thank you so

## This is very useful. I have

## great strategy!