It is currently 20 Oct 2017, 04:07

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

GMAT Prep 2 questions

Author Message
Manager
Joined: 10 May 2009
Posts: 65

Kudos [?]: 117 [0], given: 11

Show Tags

09 Jun 2009, 04:34
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Guys,

Attachments

GMATPrep2_question.doc [330 KiB]

Kudos [?]: 117 [0], given: 11

Director
Joined: 27 Jun 2008
Posts: 540

Kudos [?]: 69 [0], given: 92

WE 1: Investment Banking - 6yrs
Re: GMAT Prep 2 questions [#permalink]

Show Tags

09 Jun 2009, 05:43
Q1 - E

Q2 - C, since the radius is 4. Y lies outside

Kudos [?]: 69 [0], given: 92

Current Student
Joined: 03 Aug 2006
Posts: 115

Kudos [?]: 305 [1], given: 3

Re: GMAT Prep 2 questions [#permalink]

Show Tags

09 Jun 2009, 12:39
1
KUDOS
For Q3 - See this thread

length-of-integer-79486.html

Kudos [?]: 305 [1], given: 3

Current Student
Joined: 03 Aug 2006
Posts: 115

Kudos [?]: 305 [0], given: 3

Re: GMAT Prep 2 questions [#permalink]

Show Tags

09 Jun 2009, 13:06
The Last Problem:
A store purchased 20 coats that each cost an equal amount and then sold each of the 20 coats at an equal price. What was the store's gross profit on the 20 coats?

(1) If the selling price per coat had been twice as much, the store's gross profit on the 20 coats would have been \$2,400.

(2) If the selling price per coat had been \$2 more, the store's gross profit on the 20 coats would have been \$440.

Lets simply what the question is asking:
Purchase price of a coat = p
Selling price of a coat = s

The question is asking for the Gross profit i.e.
20s - 20p = ?
=> 20(s-p) = ?

We need to find (s-p)

Statement 1:
If S = 2s then
20(S-p) = 2400
=> S-p = 120
substitute S=2s

=> 2s-p=120 We can't simply further to get s-p => Not Sufficient

Statement 2:
If S = s+2 then
20(S-p) = 440
=> S-p = 22
substitute S = s+2

=> s+2-p = 22
=> s-p = 22-2 = 20 Hence Sufficient

Kudos [?]: 305 [0], given: 3

Current Student
Joined: 03 Aug 2006
Posts: 115

Kudos [?]: 305 [0], given: 3

Re: GMAT Prep 2 questions [#permalink]

Show Tags

09 Jun 2009, 14:28
Second Last Problem:

At a certain store, each notepad costs x dollars and each marker costs y dollars. If \$10 is enough to buy 5 notepads and 3 markers, is \$10 enough to buy 4 notepads and 4 markers instead?

1) Each notepad costs less than \$1

Given:
If cost of 1 notepad is n
If cost of 1 market is m
then
5n + 3m < 10

is 4n + 4m <10

Lets look at statement 1:
Each notepad costs less than \$1 i.e. 0<n<1

Lets find what is the largest value m can have when n=0.01 and solve for m
For n=0.01 => 5(0.01) + 3m < 10
=> 0.05 + 3m <10
=> 3m < 9.95
=> m < 3.31
As it shows m should be less then 3.31, m could be 0.01 or it could be 3.31
Similarly what is the largest value m can have when n=0.99 and solve for m
=> m < 1.68
Here it shows m should be less then 1.68, m could be 0.01 or it could be 1.68

If you take a value for m<1.5 then 4n + 4m < 10 when n=0.99
If you take a value for 1.5<m<1.68 then 4n + 4m > 10 when n=0.99

Hence Statement 1 is not sufficient.

Lets look at Statement 2:
This tells us that 11n<=10
so n <= 10/11
n <= 0.91
putting this value of n into 5n + 3m <10
=> 5(0.91) + 3m < 10
=> 3m < 5.45
=> m < 1.81

If you take a value for m<1.6 then 4n + 4m < 10 when n=0.91
If you take a value for 1.6<m<1.81 then 4n + 4m > 10 when n=0.91

Hence not sufficient

Taking them together 0<n<0.91 and 0<m<1.68 which can again satisfy nor not satisfy
4n + 4m < 10 depending on the values you pick for n and m in the range specified above.

Hence Stmt 1 and 2 together are not sufficient

I have tried my best to explain this but I may still be lacking the skills to make things simple. Either way I hope this helps.

Kudos [?]: 305 [0], given: 3

Manager
Joined: 10 May 2009
Posts: 65

Kudos [?]: 117 [0], given: 11

Re: GMAT Prep 2 questions [#permalink]

Show Tags

09 Jun 2009, 21:35
Can someone plz explain 1st and 2nd in detail?

pm4553 wrote:
Q1 - E

Q2 - C, since the radius is 4. Y lies outside

Kudos [?]: 117 [0], given: 11

Re: GMAT Prep 2 questions   [#permalink] 09 Jun 2009, 21:35
Display posts from previous: Sort by