Post your question in the Comment section below, and a GRE expert will answer it as fast as humanly possible.

- Video Course
- Video Course Overview
- General GRE Info and Strategies - 7 videos (free)
- Quantitative Comparison - 7 videos (free)
- Arithmetic - 42 videos
- Powers and Roots - 43 videos
- Algebra and Equation Solving - 78 videos
- Word Problems - 54 videos
- Geometry - 48 videos
- Integer Properties - 34 videos
- Statistics - 28 videos
- Counting - 27 videos
- Probability - 25 videos
- Data Interpretation - 24 videos
- Analytical Writing - 9 videos (free)
- Sentence Equivalence - 39 videos (free)
- Text Completion - 51 videos
- Reading Comprehension - 16 videos

- Study Guide
- About
- Office Hours
- Extras
- Prices

## Comment on

32 and 27 with Exponents## from 2nd step -

2^45 3^30

(2^30) (2^15) / (3^30) 1

(0.66)^30 (2^15) 1

since 0.66^30 yields to very small number, quantity A will be

smaller than 1. hence B

Is this way ok!

## Everything you did was

Everything you did was correct, but that strategy could get you in trouble.

Let's start from...

Quantity A: (0.66^30)(2^15)

Quantity B: 1

I agree that 0.66^30 is a very small number. However, 2^15 is a very big number. So, what you end up with is...

Quantity A: (a very small number)(a very big number)

Quantity B: 1

How can we be sure that Quantity A is less than 1?

## I used the method of unit's

## Can you tell us more about

Can you tell us more about your solution? It sounds as though you focused solely on the units digit of each quantity.

Is that correct?

Cheers,

Brent

## I approached sort of what

## I'm having a hard time

I'm supposed to take my test in February, but I'm no closer in progress than I was two weeks ago. Do you have any advice?

## This particular question is

This particular question is pretty tricky.

I suggest that you check out the linked questions in the Reinforcement Activities boxes of the following two videos:

- https://www.greenlighttestprep.com/module/gre-powers-and-roots/video/1047

- https://www.greenlighttestprep.com/module/gre-algebra-and-equation-solvi...

The concepts/techniques involved are similar to those needed for the question.

Cheers,

Brent

## Is there an easy way for me

## You should try to memorize

You should try to memorize all of the powers shown at 9:10 of the following video: https://www.greenlighttestprep.com/module/gre-powers-and-roots/video/1021

You can also find them here: https://imgur.com/jToXM75

Cheers,

Brent

## Hello, the approach that I

instead of multiplying it by 32, 9 times. I worked with 32^3 and instead 27^10 I worked with 27^4.

Is this approach applicable?

## It's hard for me to tell how

It's hard for me to tell how your solution looks.

What steps are you taking to replace 32^9 with 32^3, and to replace 27^10 with 27^4?