It is currently 16 Dec 2017, 20:18

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# 98^7

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Moderator
Joined: 18 Apr 2015
Posts: 2513
Followers: 37

Kudos [?]: 364 [0], given: 1546

98^7 [#permalink]  03 Jun 2017, 01:45
Expert's post
00:00

Difficulty:

5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

 Quantity A Quantity B \frac{98^7}{7^{63}} \frac{2^7}{7^{49}}

A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

_________________
Director
Joined: 03 Sep 2017
Posts: 522
Followers: 0

Kudos [?]: 225 [0], given: 66

Re: 98^7 [#permalink]  27 Sep 2017, 05:05
Column A can be rewritten as \frac{7^{14}2^7}{7^{63}}=\frac{2^7}{7^{49}}. Thus, column A and B are equal and answer is C!
Senior Manager
Joined: 20 Apr 2016
Posts: 282
Followers: 1

Kudos [?]: 174 [2] , given: 54

Re: 98^7 [#permalink]  27 Sep 2017, 05:47
2
KUDOS
IlCreatore wrote:
Column A can be rewritten as \frac{7^{14}2^7}{2^{63}}=\frac{2^7}{7^{49}}. Thus, column A and B are equal and answer is C!

The ans should be -

Column A & Column B is

\frac{{7^{14}2^7}}{{7^{63}}}=\frac{{2^7}}{{7^{49}}}

which comes to option C
_________________

If you found this post useful, please let me know by pressing the Kudos Button

Director
Joined: 03 Sep 2017
Posts: 522
Followers: 0

Kudos [?]: 225 [1] , given: 66

Re: 98^7 [#permalink]  28 Sep 2017, 04:43
1
KUDOS
pranab01 wrote:
IlCreatore wrote:
Column A can be rewritten as \frac{7^{14}2^7}{2^{63}}=\frac{2^7}{7^{49}}. Thus, column A and B are equal and answer is C!

The ans should be -

Column A & Column B is

\frac{{7^{14}2^7}}{{7^{63}}}=\frac{{2^7}}{{7^{49}}}

which comes to option C

You are right, I made a typo!
GRE Instructor
Joined: 10 Apr 2015
Posts: 667
Followers: 29

Kudos [?]: 510 [1] , given: 3

Re: 98^7 [#permalink]  06 Oct 2017, 15:07
1
KUDOS
Expert's post
Carcass wrote:

 Quantity A Quantity B \frac{98^7}{7^{63}} \frac{2^7}{7^{49}}

We can solve this question using matching operations

Given:
Quantity A: (98^7)/(7^63)
Quantity B: (2^7)/(7^49)

Multiply both quantities by 7^63 to get:
Quantity A: 98^7
Quantity B: (2^7)(7^14)

Rewrite 7^14 as (7^7)(7^7) to get:
Quantity A: 98^7
Quantity B: (2^7)(7^7)(7^7)

A nice rule says (a^k)(b^k) = (ab)^k

Apply this rule to quantity B to get:
Quantity A: 98^7
Quantity B: (2 x 7 x 7)^7

Simplify to get:
Quantity A: 98^7
Quantity B: 98^7

RELATED VIDEO FROM OUR COURSE

_________________

Brent Hanneson – Founder of greenlighttestprep.com

Check out the online reviews of our course

Re: 98^7   [#permalink] 06 Oct 2017, 15:07
Display posts from previous: Sort by

# 98^7

 Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.