The GMAT scoring algorithm penalizes you much more for getting easy questions wrong than it rewards you for getting difficult questions right. So, it’s better to guess on hard questions so you’ll have enough time to answer easier questions.

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## Comment on

Powers of 8## Can you not subtract the 3 in

## In order to apply the

In order to apply the Quotient Law (which is covered here https://www.gmatprepnow.com/module/gmat-powers-and-roots/video/1025) the two bases must be equal.

For example, (5^7)/(5^3) = 5^4

In the given expression, the top power has a base of 8^4, and the bottom power has a 8^3, since 8 x 8^2 = 8^3

Since the bases aren't equal, we can't apply the Quotient Law.

## Can you guys please tell me

## You bet.

You bet.

Green: Easy question (difficulty level: 350 to 500)

Yellow: Medium question (difficulty level: 500 to 650)

Red: Difficult question (difficulty level: 650 to 800)

## Hi, I'm sorry but where are

## On each module page (e.g.,

On each module page (e.g., https://www.gmatprepnow.com/module/gmat-powers-and-roots), you'll see a colored box for each video question. The box is next to the PLAY button.

## Oh awesome thanks! Is there

## I don't have the same system

I don't have the same system for the video questions. However, all of the linked questions (e.g., https://www.gmatprepnow.com/module/gmat-critical-reasoning/video/1136) are categorized by difficulty level.

## I am just lot by the title

Or is it that you decided to name the problem as such

## Yes, the exponent rules

Yes, the exponent rules needed for this question apply to all bases (not just 8).

I just needed a title for the question to distinguish it from other questions :-)

## I first got this question

## This video covers that

This video covers that concept/law: https://www.gmatprepnow.com/module/gmat-powers-and-roots/video/1029

To practice, you can answer the questions in the Reinforcement Activities area.

## this video should be very

## I agree. The difficulty for

I agree. The difficulty for this question is 350-500.