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

 It is currently 22 Jun 2018, 00:24

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Each of a, b, and c is positive. Does b = root(ac)

Author Message
TAGS:

Hide Tags

Intern
Status: active
Joined: 13 May 2013
Posts: 9
Each of a, b, and c is positive. Does b = root(ac) [#permalink]

Show Tags

Updated on: 29 Aug 2013, 13:55
1
00:00

Difficulty:

15% (low)

Question Stats:

75% (00:40) correct 25% (00:48) wrong based on 70 sessions

HideShow timer Statistics

Each of a, b, and c is positive. Does $$b = \sqrt{ac}$$?

(1) $$\frac{a}{b} = \frac{b}{c}$$
(2) $$\frac{1}{b^3} = \frac{1}{abc}$$

_________________

Useful Resources:
FlashCards: manhattangmat[dot]com/pdf/FlashCards_Complete_2009.pdf

Originally posted by reliablevish on 29 Aug 2013, 13:51.
Last edited by Bunuel on 29 Aug 2013, 13:55, edited 1 time in total.
Renamed the topic and edited the question.
Math Expert
Joined: 02 Sep 2009
Posts: 46272
Re: Each of a, b, and c is positive. Does b = root(ac) [#permalink]

Show Tags

29 Aug 2013, 13:58
Each of a, b, and c is positive. Does $$b = \sqrt{ac}$$?

(1) $$\frac{a}{b} = \frac{b}{c}$$. Cross-multiply: $$b^2=ac$$ --> $$b = \sqrt{ac}$$. Sufficient.

(2) $$\frac{1}{b^3} = \frac{1}{abc}$$. Cross-multiply: $$b^3=abc$$ --> reduce by b: $$b^2=ac$$. Sufficient.

_________________
Non-Human User
Joined: 09 Sep 2013
Posts: 7021
Re: Each of a, b, and c is positive. Does b = root(ac) [#permalink]

Show Tags

29 Mar 2017, 06:10
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.
_________________
Re: Each of a, b, and c is positive. Does b = root(ac)   [#permalink] 29 Mar 2017, 06:10
Display posts from previous: Sort by

Each of a, b, and c is positive. Does b = root(ac)

 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®.