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A non-trivial progression (Posted on 2015-11-17) Difficulty: 2 of 5
November 13, 2015, when expressed in MM/DD/YY format, is 11/13/15. The MM, DD and YY terms, in that order, form an arithmetic progression. It is non-trivial because the three numbers are different.

The first such date in any given century is 01/02/03. What is the last non-trivial arithmetic progression in the century?

What is the last non-trivial geometric progression in the century?

See The Solution Submitted by Steve Herman    
Rating: 4.6667 (3 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts re: d2 answers + my d3 remark | Comment 3 of 7 |
(In reply to d2 answers by Charlie)

Chapeau !!

Really nice!


Btw,  your solution affected my rating of the puzzle (upgraded it...)



  Posted by Ady TZIDON on 2015-11-17 11:16:08
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