Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

square root in ratio

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 85
Joined: Tue Mar 31, 2009 10:58 am
by GmatGreen » Tue Jan 28, 2014 6:53 am
Which of the following ratios is most nearly equal to the ratio 1 + sqrt(5) to 2?

A) 8 to 5
B) 6 to 5
C) 5 to 4
D) 2 to 1
E) 1 to 1
Top
Join the discussion
Source: — Problem Solving |
User avatar
GMAT Instructor
Posts: 1052
Joined: Fri May 21, 2010 1:30 amFollowed by: 98 members
Thanked: 335 times

by Patrick_GMATFix » Tue Jan 28, 2014 7:11 am
The solution below is taken from the GMATFix App (this is QID 5263).

Image

-Patrick
  • Ask me about tutoring.
Top
Join the discussion
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members
Location: New York, NY
Thanked: 13060 times
GMAT Score:790

by GMATGuruNY » Tue Jan 28, 2014 7:44 am
GmatGreen wrote:Which of the following ratios is most nearly equal to the ratio 1 + sqrt(5) to 2?

A) 8 to 5
B) 6 to 5
C) 5 to 4
D) 2 to 1
E) 1 to 1
The LCM of the denominators in the answer choices = 5*4 = 20.
Approximate the value of (1 + √5)/2 with a denominator of 20.
√5 is between 2 and 3.
Thus:
(1 + √5)/2 is between 3/2 = 30/20 and 4/2 = 40/20.

The correct answer choice must be between 30/20 and 40/20.
Only A works:
8/5 = 32/20.

The correct answer is A.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Join the discussion

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16206
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

by Brent@GMATPrepNow » Tue Jan 28, 2014 7:45 am
GmatGreen wrote:Which of the following ratios is most nearly equal to the ratio 1 + √5 to 2?

A) 8 to 5
B) 6 to 5
C) 5 to 4
D) 2 to 1
E) 1 to 1
There are 3 root evaluations that all GMAT students should memorize:
√2 ≈ 1.4
√3 ≈ 1.7
√5 ≈ 2.2

So, 1 + √5 to 2 ≈ 1 + 2.2 to 2
≈ 3.2 to 2
≈ 1.6 to 1

At this point, if we multiply both sides by 5, we get: ≈ 8 to 5 (answer choice A)

Aside: Notice that, once we get to the equivalent ratio 1.6 to 1, we can automatically eliminate answer choices D and E.
Then, if we multiply both sides by 4, we get ≈ 6.4 to 4, which means we can eliminate C

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion