It's rather suggestion, not clarification.

Problem says:

Sincethe smallest positive integer k such that n+k is not divisible by k+1

**k**starts from 1, the following examples seem unnecessary:

13 is divisible by 1

120 is divisible by 1

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- FourLegsDriveCat
**Posts:**21**Joined:**Tue Sep 11, 2012 9:18 pm**Location:**Ukraine

Hi,

It's rather suggestion, not clarification.

Problem says:**k** starts from 1, the following examples seem unnecessary:

It's rather suggestion, not clarification.

Problem says:

Sincethe smallest positive integer k such that n+k is not divisible by k+1

13 is divisible by 1

120 is divisible by 1

I disagree. $k$ is essentially the length of the streak, i.e. how many consecutive lines in the two examples have divisibility before the line where it is no longer divisible. Like a lucky streak, it is about how long you can keep it going before your luck runs out. The divisibility by 1 is part of that, regardless of the fact that a streak can never have length zero.

- FourLegsDriveCat
**Posts:**21**Joined:**Tue Sep 11, 2012 9:18 pm**Location:**Ukraine

OK, makes sense, just confusing a bit when first read.