perplexus.info :: Numbers : All 1's

All 1's (Posted on 2013-12-14)

(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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Subject	Author	Date
re(2): Divide and conquer (spoiler) & a challenge	Charlie	2013-12-15 10:14:07
re: Divide and conquer (spoiler) & a challenge	Kenny M	2013-12-15 10:09:52
Divide and conquer (spoiler)	Steve Herman	2013-12-14 21:12:35

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