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

It is currently 19 Sep 2019, 05:49

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

If 9^y + 3^b = 10*3^b, then 2y ='

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

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58113
If 9^y + 3^b = 10*3^b, then 2y ='  [#permalink]

Show Tags

New post 05 Jun 2015, 06:13
4
6
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

71% (01:47) correct 29% (02:16) wrong based on 317 sessions

HideShow timer Statistics

CEO
CEO
User avatar
D
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2972
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Reviews Badge
Re: If 9^y + 3^b = 10*3^b, then 2y ='  [#permalink]

Show Tags

New post 05 Jun 2015, 06:55
3
1
Bunuel wrote:
If 9^y + 3^b = 10*3^b, then 2y ='

(A) b – 2
(B) b – 1
(C) b
(D) b + 1
(E) b + 2


Answer: Option
Attachments

Sol7.jpg
Sol7.jpg [ 92.24 KiB | Viewed 2954 times ]


_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
Math Expert
User avatar
V
Joined: 02 Aug 2009
Posts: 7830
Re: If 9^y + 3^b = 10*3^b, then 2y ='  [#permalink]

Show Tags

New post 06 Jun 2015, 07:44
1
Bunuel wrote:
If 9^y + 3^b = 10*3^b, then 2y ='

(A) b – 2
(B) b – 1
(C) b
(D) b + 1
(E) b + 2


Hi,

9^y + 3^b = 10*3^b
3^2y=9*3^b..
3^2y=3^2*3^b
3^2y=3^(b+2).. so 2y = b+2.. ans E
_________________
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58113
Re: If 9^y + 3^b = 10*3^b, then 2y ='  [#permalink]

Show Tags

New post 08 Jun 2015, 05:46
1
CEO
CEO
User avatar
D
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2972
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Reviews Badge
Re: If 9^y + 3^b = 10*3^b, then 2y ='  [#permalink]

Show Tags

New post 05 Jun 2015, 06:58
Bunuel wrote:
If 9^y + 3^b = 10*3^b, then 2y ='

(A) b – 2
(B) b – 1
(C) b
(D) b + 1
(E) b + 2


I think this question should be Sub 600 level due to following reasons:

1) It comes from the topic Exponents which is a very basic topic of Math's
2) This question just deals with Simple arrangement and then comparison of powers and doesn't include much complexities.

Just an Opinion :)
_________________
Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

ACCESS FREE GMAT TESTS HERE:22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58113
Re: If 9^y + 3^b = 10*3^b, then 2y ='  [#permalink]

Show Tags

New post 05 Jun 2015, 07:03
GMATinsight wrote:
Bunuel wrote:
If 9^y + 3^b = 10*3^b, then 2y ='

(A) b – 2
(B) b – 1
(C) b
(D) b + 1
(E) b + 2


I think this question should be Sub 600 level due to following reasons:

1) It comes from the topic Exponents which is a very basic topic of Math's
2) This question just deals with Simple arrangement and then comparison of powers and doesn't include much complexities.

Just an Opinion :)


The difficulty level will be automatically calibrated based on users timer sessions.
_________________
Current Student
User avatar
B
Status: DONE!
Joined: 05 Sep 2016
Posts: 364
Re: If 9^y + 3^b = 10*3^b, then 2y ='  [#permalink]

Show Tags

New post 28 Oct 2016, 19:00
9^y + 3^b = 10(3^b)
3^2y + 3^b = 10(3^b)
(3^2y)/(3^b) +1=10
(3^2y)/(3^b) = 9
3^(2y-b) = 3^2
y = 1 & b = 0

2y = 2 --> b+2
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 12393
Re: If 9^y + 3^b = 10*3^b, then 2y ='  [#permalink]

Show Tags

New post 27 Feb 2018, 06:52
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 Club Bot
Re: If 9^y + 3^b = 10*3^b, then 2y ='   [#permalink] 27 Feb 2018, 06:52
Display posts from previous: Sort by

If 9^y + 3^b = 10*3^b, then 2y ='

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





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