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5 Digit Integer.......

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Manager
Joined: 02 Sep 2008
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5 Digit Integer....... [#permalink]  02 May 2009, 15:25
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Manager
Joined: 08 Feb 2009
Posts: 147
Schools: Anderson
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Kudos [?]: 34 [0], given: 3

Re: 5 Digit Integer....... [#permalink]  02 May 2009, 18:21
Lets take 123x7 as an example for this problem, where x is the tens digit.

Statement 1 - When 123x7 is multiplied by 1000, we get 123x7000, where thousands digit is 7. Doesn't give any info about x. Therefore, NOT SUFFICIENT.

Statement 2 - When 123x7 is divided by 1000, we get 12.3x7, where hundredths digit is 7 => x = 7. SUFFICIENT.

Director
Joined: 12 Oct 2008
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Re: 5 Digit Integer....... [#permalink]  04 May 2009, 20:17
I guess I am missing something here....how come x=7? Question is asking about tens digit...7 is hunderds digit....how can you find x from B???????
goldeneagle94 wrote:
Lets take 123x7 as an example for this problem, where x is the tens digit.

Statement 1 - When 123x7 is multiplied by 1000, we get 123x7000, where thousands digit is 7. Doesn't give any info about x. Therefore, NOT SUFFICIENT.

Statement 2 - When 123x7 is divided by 1000, we get 12.3x7, where hundredths digit is 7 => x = 7. SUFFICIENT.

Manager
Joined: 22 Feb 2009
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Schools: Kellogg (R1 Dinged),Cornell (R2), Emory(Interview Scheduled), IESE (R1 Interviewed), ISB (Interviewed), LBS (R2), Vanderbilt (R3 Interviewed)
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Kudos [?]: 80 [0], given: 10

Re: 5 Digit Integer....... [#permalink]  04 May 2009, 20:52
Let the 5 digit integer be abcde. We need to find d.
1. abcde X 1000= abcde000, so the thoudsands digit of this number if e. Therefore we cannot find d from this information. Hence insufficient.
2. abcde/1000= ab.cde
here c is tenth digit and d is hundredth digit. Hence when given the hundredths digit we can say that d=7

hence sufficient.

Remember: tens digit is not same as tenths digit.

123.45: Here 2 is tens digit while 4 is tenths digit

Hence B.
Manager
Joined: 08 Feb 2009
Posts: 147
Schools: Anderson
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Re: 5 Digit Integer....... [#permalink]  05 May 2009, 02:29
I guess I am missing something here....how come x=7? Question is asking about tens digit...7 is hunderds digit....how can you find x from B???????
goldeneagle94 wrote:
Lets take 123x7 as an example for this problem, where x is the tens digit.

Statement 1 - When 123x7 is multiplied by 1000, we get 123x7000, where thousands digit is 7. Doesn't give any info about x. Therefore, NOT SUFFICIENT.

Statement 2 - When 123x7 is divided by 1000, we get 12.3x7, where hundredths digit is 7 => x = 7. SUFFICIENT.

Lets take 123.456

3 - Units Digit
2 - Tens Digit
1 - Hundreds Digit
4 - Tenths Digit
5 - Hundredths Digit
6 - Thousandths Digit
Director
Joined: 12 Oct 2008
Posts: 557
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Re: 5 Digit Integer....... [#permalink]  06 May 2009, 05:57
Is oa B for this, still I am not agree, why in case number is 77777? Then tens digit is different? We are getting two values and not uniq then IMO it should be

goldeneagle94 wrote:
I guess I am missing something here....how come x=7? Question is asking about tens digit...7 is hunderds digit....how can you find x from B???????
goldeneagle94 wrote:
Lets take 123x7 as an example for this problem, where x is the tens digit.

Statement 1 - When 123x7 is multiplied by 1000, we get 123x7000, where thousands digit is 7. Doesn't give any info about x. Therefore, NOT SUFFICIENT.

Statement 2 - When 123x7 is divided by 1000, we get 12.3x7, where hundredths digit is 7 => x = 7. SUFFICIENT.

Lets take 123.456

3 - Units Digit
2 - Tens Digit
1 - Hundreds Digit
4 - Tenths Digit
5 - Hundredths Digit
6 - Thousandths Digit
Re: 5 Digit Integer.......   [#permalink] 06 May 2009, 05:57
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