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# If n is a positive integer, what is the tens digit of n? A.

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If n is a positive integer, what is the tens digit of n? A. [#permalink]

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26 Jul 2010, 14:09
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If n is a positive integer, what is the tens digit of n?
A. The hundreds digit of 10n is 6
B. The tens digit of n+1 is 7
[Reveal] Spoiler: OA

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26 Jul 2010, 16:45
kilukilam wrote:
If n is a positive integer, what is the tens digit of n?
A. The hundreds digit of 10n is 6
B. The tens digit of n+1 is 7

Statement 1 - If you multiply a +ve integer by 10 the tens digit of the original number will move to hundreds digit.
So hundreds digit of 10n is same as tens digit of n here and statement 1 alone is sufficient

Statement 2 - If tens digit of n+1 is 7 tens digit of n can be 7 or 6 depending on the unit's digit of n+1 . If units digit of n+1 is zero then tens digit of n will be 6 . For all other values(1,2,3,....9) it will be 7.So statement 2 alone is not sufficient.

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Re: If n is a positive integer, what is the tens digit of n? A. [#permalink]

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20 Sep 2017, 05:50
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Re: If n is a positive integer, what is the tens digit of n? A.   [#permalink] 20 Sep 2017, 05:50
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