Oct 18 08:00 AM PDT  09:00 AM PDT Learn an intuitive, systematic approach that will maximize your success on Fillintheblank GMAT CR Questions. Oct 19 07:00 AM PDT  09:00 AM PDT Does GMAT RC seem like an uphill battle? eGMAT is conducting a free webinar to help you learn reading strategies that can enable you to solve 700+ level RC questions with at least 90% accuracy in less than 10 days. Sat., Oct 19th at 7 am PDT Oct 20 07:00 AM PDT  09:00 AM PDT Get personalized insights on how to achieve your Target Quant Score. Oct 22 08:00 PM PDT  09:00 PM PDT On Demand for $79. For a score of 4951 (from current actual score of 40+) AllInOne Standard & 700+ Level Questions (150 questions) Oct 23 08:00 AM PDT  09:00 AM PDT Join an exclusive interview with the people behind the test. If you're taking the GMAT, this is a webinar you cannot afford to miss!
Author 
Message 
TAGS:

Hide Tags

Director
Status: I don't stop when I'm Tired,I stop when I'm done
Joined: 11 May 2014
Posts: 525
Location: Bangladesh
Concentration: Finance, Leadership
GPA: 2.81
WE: Business Development (Real Estate)

If ab = 5, bc = 10 and cd = 13, then ad =
[#permalink]
Show Tags
22 Jul 2016, 11:49
Question Stats:
89% (01:37) correct 11% (01:54) wrong based on 78 sessions
HideShow timer Statistics
If ab = 5, bc = 10 and cd = 13, then ad = A. 650 B. 65 C. 26 D.\(\frac{50}{13}\) E. \(\frac{13}{2}\)
Official Answer and Stats are available only to registered users. Register/ Login.
_________________



Marshall & McDonough Moderator
Joined: 13 Apr 2015
Posts: 1685
Location: India

Re: If ab = 5, bc = 10 and cd = 13, then ad =
[#permalink]
Show Tags
22 Jul 2016, 12:09
cd = 13 c = 13/d
bc = 10 13b/d = 10 b = 10d/13
ab = 5 10ad/13 = 5 ad = 6.5 = 13/2
Answer: E



Manager
Joined: 18 Jan 2017
Posts: 127

Re: If ab = 5, bc = 10 and cd = 13, then ad =
[#permalink]
Show Tags
17 Jul 2017, 10:39
AbdurRakib wrote: If ab = 5, bc = 10 and cd = 13, then ad =
A. 650 B. 65 C. 26
D.\(\frac{50}{13}\)
E. \(\frac{13}{2}\) ANSWER: ===== Given, ab=5 bc=10 cd=13 We need to find ad Notice a=5/b and c=13/c substitute ad= (5/b)*(13/c) = [(5*13)/bc] =[(5*13)/10] = 13/2 THE ANSWER IS E.
_________________
A KUDO = A Thankyou. If this post helped you, please send a KUDO across. YOU CAN LEARN ANYTHING!MY GMAT BLOG > https://gmatclub.com/forum/afitnessmatsomemusicfewbooksandthegmat245808.html



NonHuman User
Joined: 09 Sep 2013
Posts: 13241

Re: If ab = 5, bc = 10 and cd = 13, then ad =
[#permalink]
Show Tags
08 Oct 2018, 00:22
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: If ab = 5, bc = 10 and cd = 13, then ad =
[#permalink]
08 Oct 2018, 00:22






