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Re: If n is a positive integer, what is the tens digit of n ? [#permalink]
13 Jan 2013, 23:45

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fozzzy wrote:

How do you solve this one?

(1) The hundreds digit of 10n is 6 SUFFICIENT: If Hundred's place of 10n = 6 then Ten's place of n must be 6 e.g. n=68 tens place 6, 10n=680, hundreds place is 6

(2) The tens digit of n+1 is 7 INSUFFICIENT: If n=69; n+1=70 OR If n=77; n+1=77; i.e. n can have both 6 or 7 as tens place.

If n is a positive integer, what is the tens digit of n ? [#permalink]
18 May 2015, 07:46

If n is a positive integer, what is the tens digit of n ? (1) The hundreds digit of 10n is 6. (2) The tens digit of n + 1 is 7.

Hey Guys need your help in understanding the question. I could not understand the explanation given in the OG (Answer Explanation).That is too dorky of me however I would appreciate if someone could explain me.. Thanks in advance

Re: If n is a positive integer, what is the tens digit of n ? [#permalink]
18 May 2015, 07:49

Expert's post

nastynaf wrote:

If n is a positive integer, what is the tens digit of n ? (1) The hundreds digit of 10n is 6. (2) The tens digit of n + 1 is 7.

Hey Guys need your help in understanding the question. I could not understand the explanation given in the OG (Answer Explanation).That is too dorky of me however I would appreciate if someone could explain me.. Thanks in advance

Merging topics. Please refer to the discussion above. _________________

Re: If n is a positive integer, what is the tens digit of n ? [#permalink]
18 May 2015, 08:59

Bunuel wrote:

nastynaf wrote:

If n is a positive integer, what is the tens digit of n ? (1) The hundreds digit of 10n is 6. (2) The tens digit of n + 1 is 7.

Hey Guys need your help in understanding the question. I could not understand the explanation given in the OG (Answer Explanation).That is too dorky of me however I would appreciate if someone could explain me.. Thanks in advance

Merging topics. Please refer to the discussion above.

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