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

It is currently 21 Aug 2014, 20:40

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

What is the hundredths digit of the decimal z? (1) The

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 03 Feb 2009
Posts: 27
Schools: Duke, UNC, Emory, Ga Tech, Vanderbilt, Indiana, Wash U, Texas, Rollins
Followers: 0

Kudos [?]: 2 [0], given: 0

What is the hundredths digit of the decimal z? (1) The [#permalink] New post 02 Mar 2009, 11:50
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
What is the hundredths digit of the decimal z?

(1) The tenths digit of 100z is 2.
(2) The units digit of 1,000z is 2.
SVP
SVP
User avatar
Joined: 07 Nov 2007
Posts: 1829
Location: New York
Followers: 25

Kudos [?]: 439 [0], given: 5

GMAT Tests User
Re: DS: Decimals [#permalink] New post 02 Mar 2009, 13:20
bmiller0731 wrote:
What is the hundredths digit of the decimal z?

(1) The tenths digit of 100z is 2.
(2) The units digit of 1,000z is 2.



(1)

100z = 100* 0.002x = 0.2x

we don't about X .. it can be any number from 0-9

insufficient
(2)

1000z = 1000* 0.0002x = 0.2x

we don't about X .. it can be any number from 0-9
insufficient

combined.
both are same equation..
Not sufficient


E
_________________

Your attitude determines your altitude
Smiling wins more friends than frowning

Intern
Intern
avatar
Joined: 03 Feb 2009
Posts: 27
Schools: Duke, UNC, Emory, Ga Tech, Vanderbilt, Indiana, Wash U, Texas, Rollins
Followers: 0

Kudos [?]: 2 [0], given: 0

Re: DS: Decimals [#permalink] New post 02 Mar 2009, 15:05
Sorry, but I am still a bit confused. You arrived at the correct answer, but I am still lost.

Is 100z the same as 100*z or is z a digit.

In Statement 1, how did you know to multiply 100 * (0.002x)? I see it equaled 0.2x (where 2 is the tenths digit). But I don't see why we would have wanted to do that.

I have the same questions about statement 2. The statement says that the units digit is 2 (not the tenths digits), so why do we want the value to equal 0.2x? wouldn't it be 2x?

Sorry, as my questions are probably a bit confusing themselves. If you wouldn't mind going into a little more depth about why you did what you did, I would really appreciate it.

Thanks.
SVP
SVP
User avatar
Joined: 07 Nov 2007
Posts: 1829
Location: New York
Followers: 25

Kudos [?]: 439 [0], given: 5

GMAT Tests User
Re: DS: Decimals [#permalink] New post 02 Mar 2009, 17:22
bmiller0731 wrote:
Sorry, but I am still a bit confused. You arrived at the correct answer, but I am still lost.

Is 100z the same as 100*z or is z a digit.

In Statement 1, how did you know to multiply 100 * (0.002x)? I see it equaled 0.2x (where 2 is the tenths digit). But I don't see why we would have wanted to do that.

I have the same questions about statement 2. The statement says that the units digit is 2 (not the tenths digits), so why do we want the value to equal 0.2x? wouldn't it be 2x?

Sorry, as my questions are probably a bit confusing themselves. If you wouldn't mind going into a little more depth about why you did what you did, I would really appreciate it.

Thanks.


100z = 100* z

i took one example z = 0.002x which makes 100z = 0.2x

you can take any example which satisfies the above equation.

z= yyyyy.yyy2x --> 100z = yyyyyyy.2x --> multiple solutions found.
So not sufficient.

Similarly for the 2nd satement.
_________________

Your attitude determines your altitude
Smiling wins more friends than frowning

Manager
Manager
User avatar
Joined: 26 Dec 2008
Posts: 58
Schools: Booth (Admit R1), Sloan (Ding R1), Tuck (R1)
Followers: 2

Kudos [?]: 7 [0], given: 0

Re: DS: Decimals [#permalink] New post 02 Mar 2009, 19:13
bmiller0731 wrote:
Sorry, but I am still a bit confused. You arrived at the correct answer, but I am still lost.

Is 100z the same as 100*z or is z a digit.

In Statement 1, how did you know to multiply 100 * (0.002x)? I see it equaled 0.2x (where 2 is the tenths digit). But I don't see why we would have wanted to do that.

I have the same questions about statement 2. The statement says that the units digit is 2 (not the tenths digits), so why do we want the value to equal 0.2x? wouldn't it be 2x?

Sorry, as my questions are probably a bit confusing themselves. If you wouldn't mind going into a little more depth about why you did what you did, I would really appreciate it.

Thanks.


taking a real number rather than general number might help clarify the solution.

Let's say z = 6.723, question wants us to identify the hundredth digit or "2" in our case.

(1) 10th digit of 100z (= 672.3 ) is 7 --> doesn't give us 2 --> insufficient
(2) unit digit of 1000z (=6723) is 3 --> doesn't give us 2--> insufficient

combined (1) and (2) give 7 and 3 --> don't give us 2 --> insufficient

Thus, E

Hope this helps
Re: DS: Decimals   [#permalink] 02 Mar 2009, 19:13
    Similar topics Author Replies Last post
Similar
Topics:
What is the hundredths digit of the decimal z? (1) The marcodonzelli 3 12 Mar 2008, 12:08
What is the hundredths digit of the decimal z? (1) the LM 2 01 Apr 2007, 19:57
What is the hundredths digit of the decimal z? (1) the LM 1 08 Dec 2006, 07:17
What is hundredths digit of decimal z? mand-y 7 21 Jul 2006, 17:11
What is the hundredths digit of the decimal z (1) The tenths dinesh8 4 07 May 2006, 17:26
Display posts from previous: Sort by

What is the hundredths digit of the decimal z? (1) The

  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®.