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All 1's (Posted on 2013-12-14) Difficulty: 3 of 5
(1) Find a test for divisibility by 111.

(2) Extending this, find a test for divisibility by any number consisting solely of 1's.

Please explain why your tests work.

No Solution Yet Submitted by Danish Ahmed Khan    
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Comments: ( You must be logged in to post comments.)
  Subject Author Date
re(2): Divide and conquer (spoiler) & a challengeCharlie2013-12-15 10:14:07
re: Divide and conquer (spoiler) & a challengeKenny M2013-12-15 10:09:52
SolutionDivide and conquer (spoiler)Steve Herman2013-12-14 21:12:35
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