It is currently 23 Oct 2017, 23:30

### 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

# If 3^m=81

Author Message
TAGS:
Moderator
Joined: 18 Apr 2015
Posts: 2164
Followers: 30

Kudos [?]: 314 [0], given: 1279

If 3^m=81 [#permalink]  08 Oct 2017, 00:49
Expert's post
00:00

Difficulty:

5% (low)

Question Stats:

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

If 3^m = 81 then m^3 =

A. 9

B. 16

C. 27

D. 54

E. 64
[Reveal] Spoiler: OA

_________________
Manager
Joined: 20 Apr 2016
Posts: 209
Followers: 1

Kudos [?]: 122 [0], given: 52

Re: If 3^m=81 [#permalink]  09 Oct 2017, 01:45
Carcass wrote:

If 3^m = 81 then m^3 =

A. 9

B. 16

C. 27

D. 54

E. 64

we can re write as -
3^m = 81 = 3^4[/m]

Therefore m = 3

Now

m^3 = 4^3 =64
_________________

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

Senior Manager
Joined: 03 Sep 2017
Posts: 409
Followers: 0

Kudos [?]: 124 [0], given: 64

Re: If 3^m=81 [#permalink]  09 Oct 2017, 07:00
pranab01 wrote:
Carcass wrote:

If 3^m = 81 then m^3 =

A. 9

B. 16

C. 27

D. 54

E. 64

we can re write as -
3^m = 81 = 3^4

Therefore m = 3

Now

m^3 = 4^3 =64

There is a typo.

Rewriting the equation as 3^m = 3^4, it results that m=4.

Then, what follow is right. m^3 = 4^3 =64.

Re: If 3^m=81   [#permalink] 09 Oct 2017, 07:00
Display posts from previous: Sort by