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Special feature (Posted on 2018-07-29) Difficulty: 3 of 5
What is the biggest even number N that can't be written as a sum of odd composite numbers?

Bonus: Find another feature unique to N.

See The Solution Submitted by Ady TZIDON    
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re(2): computer solution and tidbits from a reference | Comment 4 of 6 |
(In reply to re: computer solution and tidbits from a reference by Dej Mar)

You must not be interpreting that sentence the same way as I do. I interpret it the same as Jer's "In Roman numerals, it is XXXVIII which would make it last if you put them all in alphabetical order." XXXVIII is one Roman numeral, not seven Roman numerals. It is alphabetically after, say MCMXLIV, or any other roman numeral, and is therefore the last alphabetically.
  Posted by Charlie on 2018-07-30 12:21:41

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