Find all School-related info fast with the new School-Specific MBA Forum

It is currently 22 Jul 2014, 06:40

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Tough and tricky 2:

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 18679
Followers: 3229

Kudos [?]: 22160 [0], given: 2599

Tough and tricky 2: [#permalink] New post 11 Oct 2009, 16:17
Expert's post
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

100% (04:44) correct 0% (00:00) wrong based on 13 sessions
Tough and tricky 2:

2. The price of a bushel of corn is currently $3.20, and the price of a peck of wheat is $5.80. The price of corn is increasing at a constant rate of 5x cents per day while the price of wheat is decreasing at a constant rate of \sqrt{2}*x-x cents per day. What is the approximate price when a bushel of corn costs the same amount as a peck of wheat?

(A) $4.50
(B) $5.10
(C) $5.30
(D) $5.50
(E) $5.60
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Intern
Intern
avatar
Joined: 07 Oct 2009
Posts: 19
Followers: 0

Kudos [?]: 6 [0], given: 0

Re: Tough and tricky 2: [#permalink] New post 12 Oct 2009, 03:18
320 + 5x = 580 - (1.414 - 1)x

Solve to get x
Answer = (320 + 5x)/100
= 5.6
Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 18679
Followers: 3229

Kudos [?]: 22160 [0], given: 2599

Re: Tough and tricky 2: [#permalink] New post 12 Oct 2009, 08:44
Expert's post
VP
VP
avatar
Status: There is always something new !!
Affiliations: PMI,QAI Global,eXampleCG
Joined: 08 May 2009
Posts: 1365
Followers: 10

Kudos [?]: 131 [0], given: 10

GMAT Tests User
Re: Tough and tricky 2: [#permalink] New post 03 May 2011, 22:51
5.6 indeed.solving for xd and then substituting back to 3.2 + 5x gives the value.
_________________

Visit -- http://www.sustainable-sphere.com/
Promote Green Business,Sustainable Living and Green Earth !!

Senior Manager
Senior Manager
User avatar
Joined: 13 Aug 2012
Posts: 464
Concentration: Marketing, Finance
GMAT 1: Q V0
GPA: 3.23
Followers: 14

Kudos [?]: 178 [0], given: 11

GMAT ToolKit User GMAT Tests User
Re: Tough and tricky 2: [#permalink] New post 02 Dec 2012, 22:07
3.20 + 5xD = 5.80 - (\sqrt{2}x - x)D
3.2 + 5xD = 5.80 - \sqrt{2}xD + xD
xD = \frac{2.6}{4+\sqrt{2}}
xD = 0.49

The price: 3.2 + 5 (.49) = 5.65

Answer: 5.6
_________________

Impossible is nothing to God.

Re: Tough and tricky 2:   [#permalink] 02 Dec 2012, 22:07
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic Tough and tricky 6: Probability of drawing Bunuel 5 11 Oct 2009, 17:17
Experts publish their posts in the topic Tough and tricky 5: Race Bunuel 5 11 Oct 2009, 17:14
2 Experts publish their posts in the topic Tough and tricky 4: addition problem Bunuel 9 11 Oct 2009, 16:42
Experts publish their posts in the topic Tough and tricky 3: leap year Bunuel 5 11 Oct 2009, 16:25
Experts publish their posts in the topic Tough and tricky: The sum of the even numbers. Bunuel 5 11 Oct 2009, 16:11
Display posts from previous: Sort by

Tough and tricky 2:

  Question banks Downloads My Bookmarks Reviews Important topics  


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.