GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 22 Jan 2019, 21:16

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • The winners of the GMAT game show

     January 22, 2019

     January 22, 2019

     10:00 PM PST

     11:00 PM PST

    In case you didn’t notice, we recently held the 1st ever GMAT game show and it was awesome! See who won a full GMAT course, and register to the next one.
  • Key Strategies to Master GMAT SC

     January 26, 2019

     January 26, 2019

     07:00 AM PST

     09:00 AM PST

    Attend this webinar to learn how to leverage Meaning and Logic to solve the most challenging Sentence Correction Questions.

3^10 + 3^10 + 3^10 =

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 52392
3^10 + 3^10 + 3^10 =  [#permalink]

Show Tags

New post 03 Dec 2014, 07:25
1
2
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

81% (00:24) correct 19% (01:24) wrong based on 129 sessions

HideShow timer Statistics

Intern
Intern
User avatar
Status: Amat Victoria Curam
Joined: 13 Sep 2014
Posts: 24
Location: India
Re: 3^10 + 3^10 + 3^10 =  [#permalink]

Show Tags

New post 03 Dec 2014, 08:02
3^10 + 3^10 + 3^10 = 3^10( 1 + 1 + 1 ) = 3.3^10 = 3^11

Hence A
Manager
Manager
User avatar
Joined: 21 Jul 2014
Posts: 124
GMAT ToolKit User
Re: 3^10 + 3^10 + 3^10 =  [#permalink]

Show Tags

New post 03 Dec 2014, 08:04
1
Bunuel wrote:

Tough and Tricky questions: Exponents.



3^10 + 3^10 + 3^10 =

A) 3^11
B) 3^13
C) 3^30
D) 9^10
E) 9^30

Kudos for a correct solution.

Source: Chili Hot GMAT


This problem can seem tricky at first glance, but is actually pretty quick once you see how to factor it.

Since we have 3^10 added together 3 times, we can factor out a 3 and we get 3(3^10). Once we have this, we can see we are just multiplying by 3, but that's all we are doing with our exponents anyways, so multiplying by 3 one more time just increases our exponent by 1.

So the answer is (A), 3^11.
SVP
SVP
User avatar
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1823
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Re: 3^10 + 3^10 + 3^10 =  [#permalink]

Show Tags

New post 03 Dec 2014, 19:03
Answer = A = 3^11

\(3^{10} + 3^{10} + 3^{10} = 3 * 3^{10} = 3^{11}\)
_________________

Kindly press "+1 Kudos" to appreciate :)

Manager
Manager
avatar
Joined: 02 Sep 2014
Posts: 71
Location: United States
Concentration: Strategy, International Business
GMAT 1: 700 Q49 V37
GMAT 2: 700 Q47 V40
GMAT 3: 720 Q48 V41
GPA: 3.26
WE: Consulting (Consulting)
GMAT ToolKit User Reviews Badge
Re: 3^10 + 3^10 + 3^10 =  [#permalink]

Show Tags

New post 03 Dec 2014, 19:24
1. Since 3^10 is common among all the terms, it can be factored out.
2. This factors to 3^10(1+1+1).
3. This reduces to 3^10 * (3), which is also 3^10 * 3^1.
4. You can then add the exponents: 3^10 * 3^1 = 3^10+1 = 3^11.

The answer is A.
Intern
Intern
User avatar
Joined: 08 Jul 2012
Posts: 47
Re: 3^10 + 3^10 + 3^10 =  [#permalink]

Show Tags

New post 03 Dec 2014, 19:34
3^10 + 3^10 + 3^10 = 3^10(1+1+1) =3^10*3 = 3^11
_________________

Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time. - Thomas A. Edison

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 52392
Re: 3^10 + 3^10 + 3^10 =  [#permalink]

Show Tags

New post 04 Dec 2014, 06:25
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 9462
Premium Member
Re: 3^10 + 3^10 + 3^10 =  [#permalink]

Show Tags

New post 27 Feb 2017, 06:01
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

GMAT Club Bot
Re: 3^10 + 3^10 + 3^10 = &nbs [#permalink] 27 Feb 2017, 06:01
Display posts from previous: Sort by

3^10 + 3^10 + 3^10 =

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.