It is currently 16 Jan 2018, 03:45

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Marta bought several pencils. If each pencil was either a 23

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Director
Director
avatar
Joined: 23 May 2008
Posts: 799

Kudos [?]: 90 [0], given: 0

Marta bought several pencils. If each pencil was either a 23 [#permalink]

Show Tags

New post 24 Sep 2008, 23:00
00:00
A
B
C
D
E

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.

Marta bought several pencils. If each pencil was either a 23 cent pencil or a 21 cent pencil, how many 23 cent pencils did Marta buy?

1) Marta bought a total of 6 pencils.

2) The total value of the pencils Marta bought was 130 cents.

Kudos [?]: 90 [0], given: 0

VP
VP
User avatar
Joined: 30 Jun 2008
Posts: 1026

Kudos [?]: 745 [0], given: 1

Re: veritas prep DS [#permalink]

Show Tags

New post 25 Sep 2008, 02:07
bigtreezl wrote:
Marta bought several pencils. If each pencil was either a 23 cent pencil or a 21 cent pencil, how many 23 cent pencils did Marta buy?

1) Marta bought a total of 6 pencils.

2) The total value of the pencils Marta bought was 130 cents.


1) says Marta bought 6 pencils. Lets say x pencils cost 23 Cents and the remaining 6-x cost Marta 21 Cents
Let T be the total amount Marta spent overall for 6 pencils

23x + 21(6-x) = T.

Two unknowns and one equation, Not sufficient.

2) Says Marta spent 130 cents overall for several pencils she bought. Say she bought n pencils and x of those we of 23 cents. Then 130 = 23x + 21(n-x). Again 2 unknowns and one equation, Not sufficient.

However, if we combine the two we get n=6 and T=130

so 23x + 21(6-x) = 130.

Now we have only one unknown here. So combining 1 & 2 is sufficient. Also note that we do not need to waste time in calculating x as the question is asking only whether the given statements are sufficient or not.

Answer is C

EDIT : Sheesh !! I keep falling in these C trap questions .....
_________________

"You have to find it. No one else can find it for you." - Bjorn Borg

Kudos [?]: 745 [0], given: 1

Intern
Intern
avatar
Joined: 02 Sep 2008
Posts: 45

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

Re: veritas prep DS [#permalink]

Show Tags

New post 25 Sep 2008, 05:57
I will go with B.

As we have total value, it is $130.

Now let's make an equaltion.

x is 23 cents pencils.
y is 21 cents pencils.

so, 23 x + 21 y = 130.

now with trial and error if we plug in x and y value then I come up with only one answer.

x = 2 and y = 4.

It is sufficient to answer the question.

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

Manager
Manager
avatar
Joined: 28 Aug 2008
Posts: 100

Kudos [?]: 44 [0], given: 0

Re: veritas prep DS [#permalink]

Show Tags

New post 25 Sep 2008, 08:03
I agree with B

Since there are a finite number of 23 and 21 cent options here it is easy to evaluate them all, the only answer that sums to 130 is 2(23) and 4(21)

Kudos [?]: 44 [0], given: 0

Director
Director
avatar
Joined: 23 May 2008
Posts: 799

Kudos [?]: 90 [0], given: 0

Re: veritas prep DS [#permalink]

Show Tags

New post 25 Sep 2008, 10:02
yes, the OA is B

I thought this was a tricky one

Kudos [?]: 90 [0], given: 0

Manager
Manager
avatar
Joined: 11 Jan 2008
Posts: 54

Kudos [?]: 34 [0], given: 0

Re: veritas prep DS [#permalink]

Show Tags

New post 25 Sep 2008, 10:12
Hi bigtreezl,
Just a quick q, are veritas CAT worth giving a shot?
Are they comparable to what we see on the real GMAT?

Thanks
-Jack

Kudos [?]: 34 [0], given: 0

Director
Director
avatar
Joined: 23 May 2008
Posts: 799

Kudos [?]: 90 [0], given: 0

Re: veritas prep DS [#permalink]

Show Tags

New post 25 Sep 2008, 12:57
Hi Jack

I havent actually done any of veritas CATS. A friend took the 10 week course and then let me borrow the books. I've been working through the quant books. My Friend ended up getting a 730 on the real GMAT.

Kudos [?]: 90 [0], given: 0

GMAT Instructor
avatar
Joined: 04 Jul 2006
Posts: 1256

Kudos [?]: 350 [0], given: 0

Location: Madrid
Re: veritas prep DS [#permalink]

Show Tags

New post 26 Sep 2008, 03:47
This is actually a GMATPrep question.

Kudos [?]: 350 [0], given: 0

VP
VP
User avatar
Joined: 05 Jul 2008
Posts: 1401

Kudos [?]: 469 [0], given: 1

Re: veritas prep DS [#permalink]

Show Tags

New post 26 Sep 2008, 12:32
kevincan wrote:
This is actually a GMATPrep question.


There is a exact stamps Q in OG, If I am not mistaken

Kudos [?]: 469 [0], given: 1

Manager
Manager
User avatar
Joined: 18 Jan 2008
Posts: 221

Kudos [?]: 27 [0], given: 0

Schools: The School that shall not be named
Re: veritas prep DS [#permalink]

Show Tags

New post 26 Sep 2008, 13:05
I found this question to be really anal when i first saw it....
I thought about going through possible combination of 21x+23y, then thought "nah... it cannot be that bad, GMAT cannot be this cruel."

The OA just proved me wrong! :|
_________________

明日やろうばかやろう

24 wrote:
Your East Coast bias is worse than ESPN.

Kudos [?]: 27 [0], given: 0

Manager
Manager
User avatar
Joined: 11 Mar 2008
Posts: 110

Kudos [?]: 29 [0], given: 0

Location: Canada
Re: veritas prep DS [#permalink]

Show Tags

New post 27 Oct 2008, 11:20
the ans is B

first I selected C - just what They wanted me to do :)

Why B? Because unfortunately we have one possibility when 23x+21y=130 --- if x=2 and y=4.

Guys, what is the fastest way to solve/see the possibilities without falling into the GMAT trap?

Kudos [?]: 29 [0], given: 0

Senior Manager
Senior Manager
User avatar
Joined: 21 Apr 2008
Posts: 484

Kudos [?]: 58 [0], given: 13

Schools: Kellogg, MIT, Michigan, Berkeley, Marshall, Mellon
Re: veritas prep DS [#permalink]

Show Tags

New post 11 Nov 2008, 07:40
oh $$$$$$$$$$! Edited by TIGER
this is a really tricky one!

When I saw it, I though that B would be enough and I'd pick it up... however, I'm not sure if I will be so brave in the real exam...

any advise?

Cheers
_________________

mates, please visit my profile and leave comments
http://gmatclub.com/forum/johnlewis1980-s-profile-feedback-is-more-than-welcome-80538.html

I'm not linked to GMAT questions anymore, so, if you need something, please PM me

I'm already focused on my application package :)

My experience in my second attempt
http://gmatclub.com/forum/p544312#p544312
My experience in my third attempt
http://gmatclub.com/forum/630-q-47-v-28-engineer-non-native-speaker-my-experience-78215.html#p588275

Kudos [?]: 58 [0], given: 13

Re: veritas prep DS   [#permalink] 11 Nov 2008, 07:40
Display posts from previous: Sort by

Marta bought several pencils. If each pencil was either a 23

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


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

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®.