perplexus.info :: Just Math : Lasts a year

Lasts a year (Posted on 2011-10-24)

Every 8-digit number structured ABCXABCX, where A,B and C are not necessarily distinct, is divisible by 365 iff X equals either 5 or 0.

Why?

No Solution Yet Submitted by Ady TZIDON

Rating: 3.6667 (3 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

re(2): Finishing the proof

| Comment 4 of 5 |

(In reply to re: Finishing the proof by Math Man)

Math man:

Sorry. You are correct, and I stand corrected. The first post is a complete proof.

Posted by Steve Herman on 2011-10-25 00:41:24

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