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# What is the hundredths digit of th decimal Z?

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Director
Joined: 28 Jul 2011
Posts: 563
Location: United States
Concentration: International Business, General Management
GPA: 3.86
WE: Accounting (Commercial Banking)
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Kudos [?]: 131 [2] , given: 16

What is the hundredths digit of th decimal Z? [#permalink]  28 Jan 2012, 07:38
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Difficulty:

25% (medium)

Question Stats:

64% (01:39) correct 36% (00:31) wrong based on 382 sessions
What is the hundredths digit of th decimal Z?

(1) The tenths digit of 100z is 2

(2) The units digit of 1,000z is 2
[Reveal] Spoiler: OA

_________________

+1 Kudos If found helpful..

Last edited by Bunuel on 08 Apr 2012, 02:12, edited 2 times in total.
Edited the question and added the OA
Math Expert
Joined: 02 Sep 2009
Posts: 31304
Followers: 5364

Kudos [?]: 62541 [18] , given: 9457

Re: What is the hundredths digit of th decimal Z? [#permalink]  28 Jan 2012, 08:04
18
KUDOS
Expert's post
8
This post was
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What is the hundredths digit of the decimal z?

Let's say $$z=a.bcd$$. The hundredths digit of z would be the value of $$c$$. So the question is $$c=?$$

(1) The tenths digit is 100z is 2 --> $$100z=100*a.bcd=abc.d$$ --> the tenths digit of $$100z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(2) The units digit of 1,000z is 2 --> $$1000z=1000*a.bcd=abcd$$ --> the units digit of $$1000z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(1)+(2) No new info, only the value of $$d$$ is known. Not sufficient.

Note: 1234.567

1 - THOUSANDS
2 - HUNDREDS
3 - TENS
4 - UNITS
. - decimal point
5 - TENTHS
6 - HUNDREDTHS
7 - THOUSANDTHS
_________________
Director
Joined: 28 Jul 2011
Posts: 563
Location: United States
Concentration: International Business, General Management
GPA: 3.86
WE: Accounting (Commercial Banking)
Followers: 2

Kudos [?]: 131 [0], given: 16

Re: What is the hundredths digit of th decimal Z? [#permalink]  28 Jan 2012, 15:21
Bunuel wrote:
What is the hundredths digit of the decimal z?

Let's say $$z=a.bcd$$. The hundredths digit of z would be the value of $$c$$. So the question is $$c=?$$

(1) The tenths digit is 100z is 2 --> $$100z=100*a.bcd=abc.d$$ --> the tenths digit of $$100z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(2) The units digit of 1,000z is 2 --> $$1000z=1000*a.bcd=abcd$$ --> the units digit of $$1000z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(1)+(2) No new info, only the value of $$d$$ is known. Not sufficient.

Note: 1234.567

1 - THOUSANDS
2 - HUNDREDS
3 - TENS
4 - UNITS
. - decimal point
5 - TENTHS
6 - HUNDREDTHS
7 - THOUSANDTHS

I got E, just want to confirm

My Exam is on Coming Friday..Any Advise Please i need atleast 650

Thanks a lot..
_________________

+1 Kudos If found helpful..

Math Expert
Joined: 02 Sep 2009
Posts: 31304
Followers: 5364

Kudos [?]: 62541 [0], given: 9457

Re: What is the hundredths digit of th decimal Z? [#permalink]  08 Apr 2012, 02:29
Expert's post
4
This post was
BOOKMARKED
Manager
Joined: 27 Oct 2011
Posts: 191
Location: United States
Concentration: Finance, Strategy
GMAT 1: Q V
GPA: 3.7
WE: Account Management (Consumer Products)
Followers: 4

Kudos [?]: 103 [1] , given: 4

hundredths digit of the decimal [#permalink]  18 Apr 2012, 19:02
1
KUDOS
z = 0.abcd and we are looking for b

1. 100z = ab.cd c = 2 (insufficient)
2. 1,000z = abc.d c = 2 (insufficient)
_________________

DETERMINED TO BREAK 700!!!

Math Expert
Joined: 02 Sep 2009
Posts: 31304
Followers: 5364

Kudos [?]: 62541 [0], given: 9457

Re: What is the hundredths digit of th decimal Z? [#permalink]  20 Aug 2013, 04:47
Expert's post
Bumping for review and further discussion.
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Manager
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Posts: 232
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Kudos [?]: 41 [0], given: 13

Re: What is the hundredths digit of th decimal Z? [#permalink]  28 Apr 2014, 20:09
Bunuel wrote:
What is the hundredths digit of the decimal z?

Let's say $$z=a.bcd$$. The hundredths digit of z would be the value of $$c$$. So the question is $$c=?$$

(1) The tenths digit is 100z is 2 --> $$100z=100*a.bcd=abc.d$$ --> the tenths digit of $$100z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(2) The units digit of 1,000z is 2 --> $$1000z=1000*a.bcd=abcd$$ --> the units digit of $$1000z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(1)+(2) No new info, only the value of $$d$$ is known. Not sufficient.

Note: 1234.567

1 - THOUSANDS
2 - HUNDREDS
3 - TENS
4 - UNITS
. - decimal point
5 - TENTHS
6 - HUNDREDTHS
7 - THOUSANDTHS

Hi Bunnel,

I got E for this.

I have a doubt if I will use a.bc then in statement1 I can get the hundreaths digit.

Thanks.
Manager
Joined: 10 Mar 2014
Posts: 232
Followers: 1

Kudos [?]: 41 [0], given: 13

Re: hundredths digit of the decimal [#permalink]  28 Apr 2014, 20:12
calreg11 wrote:
z = 0.abcd and we are looking for b

1. 100z = ab.cd c = 2 (insufficient)
2. 1,000z = abc.d c = 2 (insufficient)

why we will take 4 digits. can we take 0.abc?
Manager
Joined: 10 Mar 2014
Posts: 232
Followers: 1

Kudos [?]: 41 [0], given: 13

Re: What is the hundredths digit of th decimal Z? [#permalink]  28 Apr 2014, 20:13
Bunuel wrote:
What is the hundredths digit of the decimal z?

Let's say $$z=a.bcd$$. The hundredths digit of z would be the value of $$c$$. So the question is $$c=?$$

(1) The tenths digit is 100z is 2 --> $$100z=100*a.bcd=abc.d$$ --> the tenths digit of $$100z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(2) The units digit of 1,000z is 2 --> $$1000z=1000*a.bcd=abcd$$ --> the units digit of $$1000z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(1)+(2) No new info, only the value of $$d$$ is known. Not sufficient.

Note: 1234.567

1 - THOUSANDS
2 - HUNDREDS
3 - TENS
4 - UNITS
. - decimal point
5 - TENTHS
6 - HUNDREDTHS
7 - THOUSANDTHS

can we tabke a.bc instead of a.bcd. then this will not work.

Math Expert
Joined: 02 Sep 2009
Posts: 31304
Followers: 5364

Kudos [?]: 62541 [0], given: 9457

Re: What is the hundredths digit of th decimal Z? [#permalink]  29 Apr 2014, 00:07
Expert's post
PathFinder007 wrote:
Bunuel wrote:
What is the hundredths digit of the decimal z?

Let's say $$z=a.bcd$$. The hundredths digit of z would be the value of $$c$$. So the question is $$c=?$$

(1) The tenths digit is 100z is 2 --> $$100z=100*a.bcd=abc.d$$ --> the tenths digit of $$100z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(2) The units digit of 1,000z is 2 --> $$1000z=1000*a.bcd=abcd$$ --> the units digit of $$1000z$$ is the value of $$d$$. So $$d=2$$. Not sufficient to calculate $$c$$.

(1)+(2) No new info, only the value of $$d$$ is known. Not sufficient.

Note: 1234.567

1 - THOUSANDS
2 - HUNDREDS
3 - TENS
4 - UNITS
. - decimal point
5 - TENTHS
6 - HUNDREDTHS
7 - THOUSANDTHS

can we tabke a.bc instead of a.bcd. then this will not work.

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Joined: 09 Sep 2013
Posts: 8236
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Kudos [?]: 111 [0], given: 0

Re: What is the hundredths digit of th decimal Z? [#permalink]  19 Jun 2015, 00:26
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Re: What is the hundredths digit of th decimal Z?   [#permalink] 19 Jun 2015, 00:26
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# What is the hundredths digit of th decimal Z?

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