perplexus.info :: Numbers : Favorable Numbers

Favorable Numbers (Posted on 2006-11-02)

Call a positive integer n "favorable" if there is a set of n distinct positive integers whose reciprocals' sum adds to 1.

How many unfavorable numbers are there?

See The Solution Submitted by Gamer

Rating: 3.0000 (1 votes)

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Subject	Author	Date
Puzzle Answer	K Sengupta	2022-05-09 21:38:45
Me too, me too! But...	JLo	2006-11-02 13:42:05
Inductive answer	Federico Kereki	2006-11-02 12:43:16
Solution	Eric	2006-11-02 12:14:47
Minimalist Answer / No Spoiler	Old Original Oskar!	2006-11-02 10:56:09

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